725655307 has 8 divisors (see below), whose sum is σ = 784591920. Its totient is φ = 667164000.

The previous prime is 725655289. The next prime is 725655311. The reversal of 725655307 is 703556527.

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 725655307 - 2¹⁵ = 725622539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725655307.

It is not an unprimeable number, because it can be changed into a prime (725655107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107932 + ... + 114457.

It is an arithmetic number, because the mean of its divisors is an integer number (98073990).

Almost surely, 2^725655307 is an apocalyptic number.

725655307 is a deficient number, since it is larger than the sum of its proper divisors (58936613).

725655307 is a wasteful number, since it uses less digits than its factorization.

725655307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222653.

The product of its (nonzero) digits is 220500, while the sum is 40.

The square root of 725655307 is about 26937.9900326658. The cubic root of 725655307 is about 898.6214727196.

The spelling of 725655307 in words is "seven hundred twenty-five million, six hundred fifty-five thousand, three hundred seven".