259720687 has 2 divisors, whose sum is σ = 259720688. Its totient is φ = 259720686.

The previous prime is 259720661. The next prime is 259720693. The reversal of 259720687 is 786027952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259720687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259721687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129860343 + 129860344.

It is an arithmetic number, because the mean of its divisors is an integer number (129860344).

Almost surely, 2^259720687 is an apocalyptic number.

259720687 is a deficient number, since it is larger than the sum of its proper divisors (1).

259720687 is an equidigital number, since it uses as much as digits as its factorization.

259720687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 259720687 is about 16115.8520407703. The cubic root of 259720687 is about 638.0217946060.

The spelling of 259720687 in words is "two hundred fifty-nine million, seven hundred twenty thousand, six hundred eighty-seven".