725637799 has 2 divisors, whose sum is σ = 725637800. Its totient is φ = 725637798.

The previous prime is 725637769. The next prime is 725637817. The reversal of 725637799 is 997736527.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725637799 - 2¹¹ = 725635751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725637719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362818899 + 362818900.

It is an arithmetic number, because the mean of its divisors is an integer number (362818900).

Almost surely, 2^725637799 is an apocalyptic number.

725637799 is a deficient number, since it is larger than the sum of its proper divisors (1).

725637799 is an equidigital number, since it uses as much as digits as its factorization.

725637799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5000940, while the sum is 55.

The square root of 725637799 is about 26937.6650621393. The cubic root of 725637799 is about 898.6142456008.

The spelling of 725637799 in words is "seven hundred twenty-five million, six hundred thirty-seven thousand, seven hundred ninety-nine".