725449717 has 4 divisors (see below), whose sum is σ = 731869740. Its totient is φ = 719029696.

The previous prime is 725449667. The next prime is 725449727. The reversal of 725449717 is 717944527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 287845156 + 437604561 = 16966^2 + 20919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725449717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725449727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209842 + ... + 3210067.

It is an arithmetic number, because the mean of its divisors is an integer number (182967435).

Almost surely, 2^725449717 is an apocalyptic number.

It is an amenable number.

725449717 is a deficient number, since it is larger than the sum of its proper divisors (6420023).

725449717 is a wasteful number, since it uses less digits than its factorization.

725449717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420022.

The product of its digits is 493920, while the sum is 46.

The square root of 725449717 is about 26934.1737760786. The cubic root of 725449717 is about 898.5365999906.

The spelling of 725449717 in words is "seven hundred twenty-five million, four hundred forty-nine thousand, seven hundred seventeen".