725160609 has 12 divisors (see below), whose sum is σ = 1048455252. Its totient is φ = 482978400.

The previous prime is 725160607. The next prime is 725160617. The reversal of 725160609 is 906061527.

It can be written as a sum of positive squares in 2 ways, for example, as 561832209 + 163328400 = 23703^2 + 12780^2 .

It is not a de Polignac number, because 725160609 - 2¹ = 725160607 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725160607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28422 + ... + 47519.

It is an arithmetic number, because the mean of its divisors is an integer number (87371271).

Almost surely, 2^725160609 is an apocalyptic number.

It is an amenable number.

725160609 is a deficient number, since it is larger than the sum of its proper divisors (323294643).

725160609 is a wasteful number, since it uses less digits than its factorization.

725160609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77008 (or 77005 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 725160609 is about 26928.8063047733. The cubic root of 725160609 is about 898.4172217945.

The spelling of 725160609 in words is "seven hundred twenty-five million, one hundred sixty thousand, six hundred nine".