725981713 has 4 divisors (see below), whose sum is σ = 726581428. Its totient is φ = 725382000.

The previous prime is 725981579. The next prime is 725981717. The reversal of 725981713 is 317189527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 317189527 = 23 ⋅13790849.

It can be written as a sum of positive squares in 2 ways, for example, as 50865424 + 675116289 = 7132^2 + 25983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725981713 is a prime.

It is a super-2 number, since 2×725981713² = 1054098895220828738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725981713.

It is not an unprimeable number, because it can be changed into a prime (725981717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298038 + ... + 300463.

It is an arithmetic number, because the mean of its divisors is an integer number (181645357).

Almost surely, 2^725981713 is an apocalyptic number.

It is an amenable number.

725981713 is a deficient number, since it is larger than the sum of its proper divisors (599715).

725981713 is a wasteful number, since it uses less digits than its factorization.

725981713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599714.

The product of its digits is 105840, while the sum is 43.

The square root of 725981713 is about 26944.0478213649. The cubic root of 725981713 is about 898.7561884126.

The spelling of 725981713 in words is "seven hundred twenty-five million, nine hundred eighty-one thousand, seven hundred thirteen".