725575813 has 2 divisors, whose sum is σ = 725575814. Its totient is φ = 725575812.

The previous prime is 725575789. The next prime is 725575817. The reversal of 725575813 is 318575527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677717089 + 47858724 = 26033^2 + 6918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725575813 is a prime.

It is a super-2 number, since 2×725575813² = 1052920520821221938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 725575813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725575817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362787906 + 362787907.

It is an arithmetic number, because the mean of its divisors is an integer number (362787907).

Almost surely, 2^725575813 is an apocalyptic number.

It is an amenable number.

725575813 is a deficient number, since it is larger than the sum of its proper divisors (1).

725575813 is an equidigital number, since it uses as much as digits as its factorization.

725575813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294000, while the sum is 43.

The square root of 725575813 is about 26936.5144924135. The cubic root of 725575813 is about 898.5886574957.

The spelling of 725575813 in words is "seven hundred twenty-five million, five hundred seventy-five thousand, eight hundred thirteen".