724338761 has 4 divisors (see below), whose sum is σ = 739750272. Its totient is φ = 708927252.

The previous prime is 724338739. The next prime is 724338763. The reversal of 724338761 is 167833427.

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 a de Polignac number, because none of the positive numbers 2^k-724338761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724338763) 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, 7705685 + ... + 7705778.

It is an arithmetic number, because the mean of its divisors is an integer number (184937568).

Almost surely, 2^724338761 is an apocalyptic number.

It is an amenable number.

724338761 is a deficient number, since it is larger than the sum of its proper divisors (15411511).

724338761 is a wasteful number, since it uses less digits than its factorization.

724338761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15411510.

The product of its digits is 169344, while the sum is 41.

The square root of 724338761 is about 26913.5423346686. The cubic root of 724338761 is about 898.0776917188.

The spelling of 724338761 in words is "seven hundred twenty-four million, three hundred thirty-eight thousand, seven hundred sixty-one".