8156979097 has 4 divisors (see below), whose sum is σ = 8295233040. Its totient is φ = 8018725156.

The previous prime is 8156979037. The next prime is 8156979107. The reversal of 8156979097 is 7909796518.

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 8156979097 - 2⁷ = 8156978969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8156979007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69126883 + ... + 69127000.

It is an arithmetic number, because the mean of its divisors is an integer number (2073808260).

Almost surely, 2^8156979097 is an apocalyptic number.

It is an amenable number.

8156979097 is a deficient number, since it is larger than the sum of its proper divisors (138253943).

8156979097 is a wasteful number, since it uses less digits than its factorization.

8156979097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138253942.

The product of its (nonzero) digits is 8573040, while the sum is 61.

The square root of 8156979097 is about 90315.9957980866. The cubic root of 8156979097 is about 2012.9969481319.

The spelling of 8156979097 in words is "eight billion, one hundred fifty-six million, nine hundred seventy-nine thousand, ninety-seven".