79316987 has 2 divisors, whose sum is σ = 79316988. Its totient is φ = 79316986.

The previous prime is 79316981. The next prime is 79316989. The reversal of 79316987 is 78961397.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79316987 - 2¹⁴ = 79300603 is a prime.

Together with 79316989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79316981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39658493 + 39658494.

It is an arithmetic number, because the mean of its divisors is an integer number (39658494).

Almost surely, 2^79316987 is an apocalyptic number.

79316987 is a deficient number, since it is larger than the sum of its proper divisors (1).

79316987 is an equidigital number, since it uses as much as digits as its factorization.

79316987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 79316987 is about 8906.0084774269. The cubic root of 79316987 is about 429.6571758223.

The spelling of 79316987 in words is "seventy-nine million, three hundred sixteen thousand, nine hundred eighty-seven".