79155969 has 4 divisors (see below), whose sum is σ = 105541296. Its totient is φ = 52770644.

The previous prime is 79155941. The next prime is 79156003. The reversal of 79155969 is 96955197.

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 not a de Polignac number, because 79155969 - 2⁹ = 79155457 is a prime.

It is a super-2 number, since 2×79155969² = 12531334856657922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79155929) 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, 13192659 + ... + 13192664.

It is an arithmetic number, because the mean of its divisors is an integer number (26385324).

Almost surely, 2^79155969 is an apocalyptic number.

It is an amenable number.

79155969 is a deficient number, since it is larger than the sum of its proper divisors (26385327).

79155969 is a wasteful number, since it uses less digits than its factorization.

79155969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26385326.

The product of its digits is 765450, while the sum is 51.

The square root of 79155969 is about 8896.9640327474. The cubic root of 79155969 is about 429.3662360146.

The spelling of 79155969 in words is "seventy-nine million, one hundred fifty-five thousand, nine hundred sixty-nine".