79880287 has 2 divisors, whose sum is σ = 79880288. Its totient is φ = 79880286.

The previous prime is 79880261. The next prime is 79880309. The reversal of 79880287 is 78208897.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79880287 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79880287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79880257) 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, 39940143 + 39940144.

It is an arithmetic number, because the mean of its divisors is an integer number (39940144).

Almost surely, 2^79880287 is an apocalyptic number.

79880287 is a deficient number, since it is larger than the sum of its proper divisors (1).

79880287 is an equidigital number, since it uses as much as digits as its factorization.

79880287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 79880287 is about 8937.5772444214. The cubic root of 79880287 is about 430.6719025100.

The spelling of 79880287 in words is "seventy-nine million, eight hundred eighty thousand, two hundred eighty-seven".