725490013 has 4 divisors (see below), whose sum is σ = 750506940. Its totient is φ = 700473088.

The previous prime is 725490001. The next prime is 725490037. The reversal of 725490013 is 310094527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 608460889 + 117029124 = 24667^2 + 10818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725490013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725490313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12508420 + ... + 12508477.

It is an arithmetic number, because the mean of its divisors is an integer number (187626735).

Almost surely, 2^725490013 is an apocalyptic number.

It is an amenable number.

725490013 is a deficient number, since it is larger than the sum of its proper divisors (25016927).

725490013 is a wasteful number, since it uses less digits than its factorization.

725490013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25016926.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 725490013 is about 26934.9218116556. The cubic root of 725490013 is about 898.5532364574.

The spelling of 725490013 in words is "seven hundred twenty-five million, four hundred ninety thousand, thirteen".