79775287 has 2 divisors, whose sum is σ = 79775288. Its totient is φ = 79775286.

The previous prime is 79775279. The next prime is 79775321. The reversal of 79775287 is 78257797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79775287 - 2³ = 79775279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79775587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39887643 + 39887644.

It is an arithmetic number, because the mean of its divisors is an integer number (39887644).

Almost surely, 2^79775287 is an apocalyptic number.

79775287 is a deficient number, since it is larger than the sum of its proper divisors (1).

79775287 is an equidigital number, since it uses as much as digits as its factorization.

79775287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728720, while the sum is 52.

The square root of 79775287 is about 8931.7012377262. The cubic root of 79775287 is about 430.4831184367.

The spelling of 79775287 in words is "seventy-nine million, seven hundred seventy-five thousand, two hundred eighty-seven".