725418931 has 2 divisors, whose sum is σ = 725418932. Its totient is φ = 725418930.

The previous prime is 725418923. The next prime is 725418943. The reversal of 725418931 is 139814527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725418931 - 2³ = 725418923 is a prime.

It is a super-2 number, since 2×725418931² = 1052465250906365522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725418131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362709465 + 362709466.

It is an arithmetic number, because the mean of its divisors is an integer number (362709466).

Almost surely, 2^725418931 is an apocalyptic number.

725418931 is a deficient number, since it is larger than the sum of its proper divisors (1).

725418931 is an equidigital number, since it uses as much as digits as its factorization.

725418931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 725418931 is about 26933.6022655715. The cubic root of 725418931 is about 898.5238893742.

The spelling of 725418931 in words is "seven hundred twenty-five million, four hundred eighteen thousand, nine hundred thirty-one".