79159691 has 4 divisors (see below), whose sum is σ = 85248912. Its totient is φ = 73070472.

The previous prime is 79159679. The next prime is 79159697. The reversal of 79159691 is 19695197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19695197 = 17 ⋅1158541.

It is a cyclic number.

It is not a de Polignac number, because 79159691 - 2¹⁸ = 78897547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79159697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3044591 + ... + 3044616.

It is an arithmetic number, because the mean of its divisors is an integer number (21312228).

Almost surely, 2^79159691 is an apocalyptic number.

79159691 is a deficient number, since it is larger than the sum of its proper divisors (6089221).

79159691 is a wasteful number, since it uses less digits than its factorization.

79159691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089220.

The product of its digits is 153090, while the sum is 47.

The square root of 79159691 is about 8897.1732027650. The cubic root of 79159691 is about 429.3729656654.

The spelling of 79159691 in words is "seventy-nine million, one hundred fifty-nine thousand, six hundred ninety-one".