725960905 has 8 divisors (see below), whose sum is σ = 894697992. Its totient is φ = 565072128.

The previous prime is 725960897. The next prime is 725960947. The reversal of 725960905 is 509069527.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 217503504 + 508457401 = 14748^2 + 22549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725960905 - 2³ = 725960897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1961872 + ... + 1962241.

It is an arithmetic number, because the mean of its divisors is an integer number (111837249).

Almost surely, 2^725960905 is an apocalyptic number.

It is an amenable number.

725960905 is a deficient number, since it is larger than the sum of its proper divisors (168737087).

725960905 is a wasteful number, since it uses less digits than its factorization.

725960905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924155.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 725960905 is about 26943.6616850791. The cubic root of 725960905 is about 898.7476016502.

The spelling of 725960905 in words is "seven hundred twenty-five million, nine hundred sixty thousand, nine hundred five".