725687 has 2 divisors, whose sum is σ = 725688. Its totient is φ = 725686.

The previous prime is 725671. The next prime is 725723. The reversal of 725687 is 786527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725687 - 2⁴ = 725671 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725687.

It is not a weakly prime, because it can be changed into another prime (725587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362843 + 362844.

It is an arithmetic number, because the mean of its divisors is an integer number (362844).

2⁷²⁵⁶⁸⁷ is an apocalyptic number.

725687 is a deficient number, since it is larger than the sum of its proper divisors (1).

725687 is an equidigital number, since it uses as much as digits as its factorization.

725687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The square root of 725687 is about 851.8726430635. The cubic root of 725687 is about 89.8634554962.

The spelling of 725687 in words is "seven hundred twenty-five thousand, six hundred eighty-seven".