725079731 has 2 divisors, whose sum is σ = 725079732. Its totient is φ = 725079730.

The previous prime is 725079709. The next prime is 725079737. The reversal of 725079731 is 137970527.

It is a strong prime.

It is an emirp because it is prime and its reverse (137970527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725079731 - 2¹⁰ = 725078707 is a prime.

It is a super-2 number, since 2×725079731² = 1051481232614064722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725079737) 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, 362539865 + 362539866.

It is an arithmetic number, because the mean of its divisors is an integer number (362539866).

Almost surely, 2^725079731 is an apocalyptic number.

725079731 is a deficient number, since it is larger than the sum of its proper divisors (1).

725079731 is an equidigital number, since it uses as much as digits as its factorization.

725079731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 725079731 is about 26927.3045624697. The cubic root of 725079731 is about 898.3838200493.

The spelling of 725079731 in words is "seven hundred twenty-five million, seventy-nine thousand, seven hundred thirty-one".