725813779 has 8 divisors (see below), whose sum is σ = 736588080. Its totient is φ = 715097856.

The previous prime is 725813773. The next prime is 725813789. The reversal of 725813779 is 977318527.

It is a happy number.

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 725813779 - 2³ = 725813771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725813771) 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, 10779 + ... + 39595.

It is an arithmetic number, because the mean of its divisors is an integer number (92073510).

Almost surely, 2^725813779 is an apocalyptic number.

725813779 is a deficient number, since it is larger than the sum of its proper divisors (10774301).

725813779 is a wasteful number, since it uses less digits than its factorization.

725813779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29189.

The product of its digits is 740880, while the sum is 49.

The square root of 725813779 is about 26940.9312942222. The cubic root of 725813779 is about 898.6868830117.

The spelling of 725813779 in words is "seven hundred twenty-five million, eight hundred thirteen thousand, seven hundred seventy-nine".