725684497 has 2 divisors, whose sum is σ = 725684498. Its totient is φ = 725684496.

The previous prime is 725684489. The next prime is 725684501. The reversal of 725684497 is 794486527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600446016 + 125238481 = 24504^2 + 11191^2 .

It is an emirp because it is prime and its reverse (794486527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725684497 - 2³ = 725684489 is a prime.

It is a super-2 number, since 2×725684497² = 1053235978372286018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (725604497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362842248 + 362842249.

It is an arithmetic number, because the mean of its divisors is an integer number (362842249).

Almost surely, 2^725684497 is an apocalyptic number.

It is an amenable number.

725684497 is a deficient number, since it is larger than the sum of its proper divisors (1).

725684497 is an equidigital number, since it uses as much as digits as its factorization.

725684497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The square root of 725684497 is about 26938.5318271059. The cubic root of 725684497 is about 898.6335217869.

The spelling of 725684497 in words is "seven hundred twenty-five million, six hundred eighty-four thousand, four hundred ninety-seven".