725556239 has 2 divisors, whose sum is σ = 725556240. Its totient is φ = 725556238.

The previous prime is 725556119. The next prime is 725556253. The reversal of 725556239 is 932655527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725556239 - 2²⁴ = 708779023 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 725556239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725556269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362778119 + 362778120.

It is an arithmetic number, because the mean of its divisors is an integer number (362778120).

Almost surely, 2^725556239 is an apocalyptic number.

725556239 is a deficient number, since it is larger than the sum of its proper divisors (1).

725556239 is an equidigital number, since it uses as much as digits as its factorization.

725556239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 44.

The square root of 725556239 is about 26936.1511541645. The cubic root of 725556239 is about 898.5805769560.

The spelling of 725556239 in words is "seven hundred twenty-five million, five hundred fifty-six thousand, two hundred thirty-nine".