79939087 has 2 divisors, whose sum is σ = 79939088. Its totient is φ = 79939086.

The previous prime is 79939063. The next prime is 79939103. The reversal of 79939087 is 78093997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79939087 - 2¹⁵ = 79906319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79939037) 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, 39969543 + 39969544.

It is an arithmetic number, because the mean of its divisors is an integer number (39969544).

Almost surely, 2^79939087 is an apocalyptic number.

79939087 is a deficient number, since it is larger than the sum of its proper divisors (1).

79939087 is an equidigital number, since it uses as much as digits as its factorization.

79939087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 79939087 is about 8940.8661213554. The cubic root of 79939087 is about 430.7775493381. Note that the first 3 decimals are identical.

The spelling of 79939087 in words is "seventy-nine million, nine hundred thirty-nine thousand, eighty-seven".