725079991 has 8 divisors (see below), whose sum is σ = 757031040. Its totient is φ = 693164472.

The previous prime is 725079989. The next prime is 725080001. The reversal of 725079991 is 199970527.

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 725079991 - 2¹ = 725079989 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 (725079941) 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, 38200 + ... + 53938.

It is an arithmetic number, because the mean of its divisors is an integer number (94628880).

Almost surely, 2^725079991 is an apocalyptic number.

725079991 is a deficient number, since it is larger than the sum of its proper divisors (31951049).

725079991 is a wasteful number, since it uses less digits than its factorization.

725079991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17765.

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 725079991 is about 26927.3093902826. The cubic root of 725079991 is about 898.3839274305.

The spelling of 725079991 in words is "seven hundred twenty-five million, seventy-nine thousand, nine hundred ninety-one".