725398717 has 2 divisors, whose sum is σ = 725398718. Its totient is φ = 725398716.

The previous prime is 725398627. The next prime is 725398733. The reversal of 725398717 is 717893527.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 615337636 + 110061081 = 24806^2 + 10491^2 .

It is a cyclic number.

It is not a de Polignac number, because 725398717 - 2²³ = 717010109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725398787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362699358 + 362699359.

It is an arithmetic number, because the mean of its divisors is an integer number (362699359).

Almost surely, 2^725398717 is an apocalyptic number.

It is an amenable number.

725398717 is a deficient number, since it is larger than the sum of its proper divisors (1).

725398717 is an equidigital number, since it uses as much as digits as its factorization.

725398717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 49.

The square root of 725398717 is about 26933.2270068033. The cubic root of 725398717 is about 898.5155434241.

The spelling of 725398717 in words is "seven hundred twenty-five million, three hundred ninety-eight thousand, seven hundred seventeen".