724818881 has 4 divisors (see below), whose sum is σ = 725072832. Its totient is φ = 724564932.

The previous prime is 724818877. The next prime is 724818883. The reversal of 724818881 is 188818427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 724818881 - 2² = 724818877 is a prime.

It is a super-2 number, since 2×724818881² = 1050724820508184322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724818883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122645 + ... + 128418.

It is an arithmetic number, because the mean of its divisors is an integer number (181268208).

Almost surely, 2^724818881 is an apocalyptic number.

It is an amenable number.

724818881 is a deficient number, since it is larger than the sum of its proper divisors (253951).

724818881 is a wasteful number, since it uses less digits than its factorization.

724818881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253950.

The product of its digits is 229376, while the sum is 47.

The square root of 724818881 is about 26922.4605301967. The cubic root of 724818881 is about 898.2760748746.

The spelling of 724818881 in words is "seven hundred twenty-four million, eight hundred eighteen thousand, eight hundred eighty-one".