725425639 has 2 divisors, whose sum is σ = 725425640. Its totient is φ = 725425638.

The previous prime is 725425627. The next prime is 725425661. The reversal of 725425639 is 936524527.

It is a weak prime.

It is an emirp because it is prime and its reverse (936524527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725425639 - 2⁵ = 725425607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 725425595 and 725425604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725425619) 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, 362712819 + 362712820.

It is an arithmetic number, because the mean of its divisors is an integer number (362712820).

Almost surely, 2^725425639 is an apocalyptic number.

725425639 is a deficient number, since it is larger than the sum of its proper divisors (1).

725425639 is an equidigital number, since it uses as much as digits as its factorization.

725425639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 43.

The square root of 725425639 is about 26933.7267937432. The cubic root of 725425639 is about 898.5266589369.

The spelling of 725425639 in words is "seven hundred twenty-five million, four hundred twenty-five thousand, six hundred thirty-nine".