79432991 has 6 divisors (see below), whose sum is σ = 87310776. Its totient is φ = 72211700.

The previous prime is 79432981. The next prime is 79433021. The reversal of 79432991 is 19923497.

It is not a de Polignac number, because 79432991 - 2²⁶ = 12324127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79432921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 328115 + ... + 328356.

It is an arithmetic number, because the mean of its divisors is an integer number (14551796).

Almost surely, 2^79432991 is an apocalyptic number.

79432991 is a deficient number, since it is larger than the sum of its proper divisors (7877785).

79432991 is a wasteful number, since it uses less digits than its factorization.

79432991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656493 (or 656482 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The square root of 79432991 is about 8912.5187797839. The cubic root of 79432991 is about 429.8665369107.

The spelling of 79432991 in words is "seventy-nine million, four hundred thirty-two thousand, nine hundred ninety-one".