79798687 has 2 divisors, whose sum is σ = 79798688. Its totient is φ = 79798686.

The previous prime is 79798637. The next prime is 79798721. The reversal of 79798687 is 78689797.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79798687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79798627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39899343 + 39899344.

It is an arithmetic number, because the mean of its divisors is an integer number (39899344).

Almost surely, 2^79798687 is an apocalyptic number.

79798687 is a deficient number, since it is larger than the sum of its proper divisors (1).

79798687 is an equidigital number, since it uses as much as digits as its factorization.

79798687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 61.

The square root of 79798687 is about 8933.0110824962. The cubic root of 79798687 is about 430.5252046541.

The spelling of 79798687 in words is "seventy-nine million, seven hundred ninety-eight thousand, six hundred eighty-seven".