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131010049 = 631120759
BaseRepresentation
bin1111100111100…
…00111000000001
3100010112000000001
413303300320001
5232014310144
621000000001
73150365332
oct763607001
9303460001
10131010049
1167a51875
1237a60001
13211b0451
1413584289
15b77cbd4
hex7cf0e01

131010049 has 4 divisors (see below), whose sum is σ = 131037120. Its totient is φ = 130982980.

The previous prime is 131010037. The next prime is 131010071. The reversal of 131010049 is 940010131.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2k-131010049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131010079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4069 + ... + 16690.

It is an arithmetic number, because the mean of its divisors is an integer number (32759280).

Almost surely, 2131010049 is an apocalyptic number.

It is an amenable number.

131010049 is a deficient number, since it is larger than the sum of its proper divisors (27071).

131010049 is an equidigital number, since it uses as much as digits as its factorization.

131010049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27070.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 131010049 is about 11445.9621264444. The cubic root of 131010049 is about 507.8882938399. Note that the first 3 decimals are identical.

The spelling of 131010049 in words is "one hundred thirty-one million, ten thousand, forty-nine".

Divisors: 1 6311 20759 131010049