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8130079 = 11097331
BaseRepresentation
bin11111000000111000011111
3120022001101001
4133000320133
54040130304
6450131131
7126050566
oct37007037
916261331
108130079
114653281
122880aa7
1318b86c9
141118bdd
15aa8da4
hex7c0e1f

8130079 has 4 divisors (see below), whose sum is σ = 8138520. Its totient is φ = 8121640.

The previous prime is 8130077. The next prime is 8130113. The reversal of 8130079 is 9700318.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9700318 = 24850159.

It is a cyclic number.

It is not a de Polignac number, because 8130079 - 21 = 8130077 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8130071) 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, 2557 + ... + 4774.

It is an arithmetic number, because the mean of its divisors is an integer number (2034630).

Almost surely, 28130079 is an apocalyptic number.

8130079 is a deficient number, since it is larger than the sum of its proper divisors (8441).

8130079 is a wasteful number, since it uses less digits than its factorization.

8130079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8440.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 8130079 is about 2851.3293390978. The cubic root of 8130079 is about 201.0781689806.

The spelling of 8130079 in words is "eight million, one hundred thirty thousand, seventy-nine".

Divisors: 1 1109 7331 8130079