724489957 has 4 divisors (see below), whose sum is σ = 726401920. Its totient is φ = 722577996.

The previous prime is 724489907. The next prime is 724489963. The reversal of 724489957 is 759984427.

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, and also an emirpimes, since its reverse is a distinct semiprime: 759984427 = 97 ⋅7834891.

It is a cyclic number.

It is not a de Polignac number, because 724489957 - 2²⁷ = 590272229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 724489898 and 724489907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724489907) 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, 955413 + ... + 956170.

It is an arithmetic number, because the mean of its divisors is an integer number (181600480).

Almost surely, 2^724489957 is an apocalyptic number.

It is an amenable number.

724489957 is a deficient number, since it is larger than the sum of its proper divisors (1911963).

724489957 is a wasteful number, since it uses less digits than its factorization.

724489957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911962.

The product of its digits is 5080320, while the sum is 55.

The square root of 724489957 is about 26916.3511085734. The cubic root of 724489957 is about 898.1401745953.

The spelling of 724489957 in words is "seven hundred twenty-four million, four hundred eighty-nine thousand, nine hundred fifty-seven".