725709998 has 12 divisors (see below), whose sum is σ = 1178742528. Its totient is φ = 334942920.

The previous prime is 725709983. The next prime is 725710019. The reversal of 725709998 is 899907527.

725709998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1073198 + ... + 1073873.

It is an arithmetic number, because the mean of its divisors is an integer number (98228544).

Almost surely, 2^725709998 is an apocalyptic number.

725709998 is a deficient number, since it is larger than the sum of its proper divisors (453032530).

725709998 is a wasteful number, since it uses less digits than its factorization.

725709998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147099 (or 2147086 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 725709998 is about 26939.0051412445. The cubic root of 725709998 is about 898.6440478420.

The spelling of 725709998 in words is "seven hundred twenty-five million, seven hundred nine thousand, nine hundred ninety-eight".