79795987 has 2 divisors, whose sum is σ = 79795988. Its totient is φ = 79795986.

The previous prime is 79795981. The next prime is 79795997. The reversal of 79795987 is 78959797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79795987 - 2³ = 79795979 is a prime.

It is not a weakly prime, because it can be changed into another prime (79795981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39897993 + 39897994.

It is an arithmetic number, because the mean of its divisors is an integer number (39897994).

Almost surely, 2^79795987 is an apocalyptic number.

79795987 is a deficient number, since it is larger than the sum of its proper divisors (1).

79795987 is an equidigital number, since it uses as much as digits as its factorization.

79795987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 61.

The square root of 79795987 is about 8932.8599563634. The cubic root of 79795987 is about 430.5203489720.

The spelling of 79795987 in words is "seventy-nine million, seven hundred ninety-five thousand, nine hundred eighty-seven".