79047691 has 4 divisors (see below), whose sum is σ = 79093384. Its totient is φ = 79002000.

The previous prime is 79047677. The next prime is 79047743. The reversal of 79047691 is 19674097.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19674097 = 461 ⋅42677.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79047691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79047491) 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, 20145 + ... + 23746.

It is an arithmetic number, because the mean of its divisors is an integer number (19773346).

Almost surely, 2^79047691 is an apocalyptic number.

79047691 is a deficient number, since it is larger than the sum of its proper divisors (45693).

79047691 is a wasteful number, since it uses less digits than its factorization.

79047691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45692.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 79047691 is about 8890.8768408971. The cubic root of 79047691 is about 429.1703689923.

The spelling of 79047691 in words is "seventy-nine million, forty-seven thousand, six hundred ninety-one".