724721563 has 4 divisors (see below), whose sum is σ = 730428160. Its totient is φ = 719014968.

The previous prime is 724721549. The next prime is 724721573. The reversal of 724721563 is 365127427.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 724721563 - 2⁵ = 724721531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724721573) 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, 2853108 + ... + 2853361.

It is an arithmetic number, because the mean of its divisors is an integer number (182607040).

Almost surely, 2^724721563 is an apocalyptic number.

724721563 is a deficient number, since it is larger than the sum of its proper divisors (5706597).

724721563 is a wasteful number, since it uses less digits than its factorization.

724721563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5706596.

The product of its digits is 70560, while the sum is 37.

The square root of 724721563 is about 26920.6530938609. The cubic root of 724721563 is about 898.2358706497.

The spelling of 724721563 in words is "seven hundred twenty-four million, seven hundred twenty-one thousand, five hundred sixty-three".