725316981 has 8 divisors (see below), whose sum is σ = 977955840. Its totient is φ = 478111392.

The previous prime is 725316979. The next prime is 725317007. The reversal of 725316981 is 189613527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 725316981 - 2¹ = 725316979 is a prime.

It is a super-2 number, since 2×725316981² = 1052169445853908722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725316971) 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 in 7 ways as a sum of consecutive naturals, for example, 1358005 + ... + 1358538.

It is an arithmetic number, because the mean of its divisors is an integer number (122244480).

Almost surely, 2^725316981 is an apocalyptic number.

It is an amenable number.

725316981 is a deficient number, since it is larger than the sum of its proper divisors (252638859).

725316981 is a wasteful number, since it uses less digits than its factorization.

725316981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716635.

The product of its digits is 90720, while the sum is 42.

The square root of 725316981 is about 26931.7095818294. The cubic root of 725316981 is about 898.4817947085.

The spelling of 725316981 in words is "seven hundred twenty-five million, three hundred sixteen thousand, nine hundred eighty-one".