725017213 has 2 divisors, whose sum is σ = 725017214. Its totient is φ = 725017212.

The previous prime is 725017199. The next prime is 725017217. The reversal of 725017213 is 312710527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666310969 + 58706244 = 25813^2 + 7662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725017213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725017217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362508606 + 362508607.

It is an arithmetic number, because the mean of its divisors is an integer number (362508607).

Almost surely, 2^725017213 is an apocalyptic number.

It is an amenable number.

725017213 is a deficient number, since it is larger than the sum of its proper divisors (1).

725017213 is an equidigital number, since it uses as much as digits as its factorization.

725017213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 725017213 is about 26926.1436711609. The cubic root of 725017213 is about 898.3579990849.

The spelling of 725017213 in words is "seven hundred twenty-five million, seventeen thousand, two hundred thirteen".