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3129493 = 3838171
BaseRepresentation
bin1011111100000010010101
312212222212011
423330002111
51300120433
6151024221
735412613
oct13740225
95788764
103129493
111848264
12106b071
13857593
145b66b3
1541c3cd
hex2fc095

3129493 has 4 divisors (see below), whose sum is σ = 3138048. Its totient is φ = 3120940.

The previous prime is 3129487. The next prime is 3129517. The reversal of 3129493 is 3949213.

3129493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3129493 - 25 = 3129461 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3703 + ... + 4468.

It is an arithmetic number, because the mean of its divisors is an integer number (784512).

Almost surely, 23129493 is an apocalyptic number.

It is an amenable number.

3129493 is a deficient number, since it is larger than the sum of its proper divisors (8555).

3129493 is an equidigital number, since it uses as much as digits as its factorization.

3129493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554.

The product of its digits is 5832, while the sum is 31.

The square root of 3129493 is about 1769.0373088208. The cubic root of 3129493 is about 146.2709206199.

The spelling of 3129493 in words is "three million, one hundred twenty-nine thousand, four hundred ninety-three".

Divisors: 1 383 8171 3129493