79495991 has 2 divisors, whose sum is σ = 79495992. Its totient is φ = 79495990.

The previous prime is 79495987. The next prime is 79496023. The reversal of 79495991 is 19959497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79495991 - 2² = 79495987 is a prime.

It is a super-2 number, since 2×79495991² = 12639225170144162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79425991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39747995 + 39747996.

It is an arithmetic number, because the mean of its divisors is an integer number (39747996).

Almost surely, 2^79495991 is an apocalyptic number.

79495991 is a deficient number, since it is larger than the sum of its proper divisors (1).

79495991 is an equidigital number, since it uses as much as digits as its factorization.

79495991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 53.

The square root of 79495991 is about 8916.0524336727. The cubic root of 79495991 is about 429.9801523199.

The spelling of 79495991 in words is "seventy-nine million, four hundred ninety-five thousand, nine hundred ninety-one".