724651605 has 36 divisors (see below), whose sum is σ = 1334319012. Its totient is φ = 363740160.

The previous prime is 724651597. The next prime is 724651633. The reversal of 724651605 is 506156427.

It is a happy number.

724651605 is a `hidden beast` number, since 7 + 2 + 46 + 5 + 1 + 605 = 666.

724651605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 228342321 + 496309284 = 15111^2 + 22278^2 .

It is not a de Polignac number, because 724651605 - 2³ = 724651597 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 724651605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14856 + ... + 40865.

It is an arithmetic number, because the mean of its divisors is an integer number (37064417).

Almost surely, 2^724651605 is an apocalyptic number.

It is an amenable number.

724651605 is a deficient number, since it is larger than the sum of its proper divisors (609667407).

724651605 is a wasteful number, since it uses less digits than its factorization.

724651605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55766 (or 55746 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 724651605 is about 26919.3537255262. The cubic root of 724651605 is about 898.2069672242.

The spelling of 724651605 in words is "seven hundred twenty-four million, six hundred fifty-one thousand, six hundred five".