725827991 has 8 divisors (see below), whose sum is σ = 830029824. Its totient is φ = 621754200.

The previous prime is 725827967. The next prime is 725828027. The reversal of 725827991 is 199728527.

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 725827991 - 2²² = 721633687 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 (725827931) 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, 19535 + ... + 42816.

It is an arithmetic number, because the mean of its divisors is an integer number (103753728).

Almost surely, 2^725827991 is an apocalyptic number.

725827991 is a deficient number, since it is larger than the sum of its proper divisors (104201833).

725827991 is a wasteful number, since it uses less digits than its factorization.

725827991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64021.

The product of its digits is 635040, while the sum is 50.

The square root of 725827991 is about 26941.1950551567. The cubic root of 725827991 is about 898.6927486368.

The spelling of 725827991 in words is "seven hundred twenty-five million, eight hundred twenty-seven thousand, nine hundred ninety-one".