712865731 has 4 divisors (see below), whose sum is σ = 750385000. Its totient is φ = 675346464.

The previous prime is 712865689. The next prime is 712865737. The reversal of 712865731 is 137568217.

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 712865731 - 2⁷ = 712865603 is a prime.

It is a super-2 number, since 2×712865731² = 1016355100868328722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712865737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18759606 + ... + 18759643.

It is an arithmetic number, because the mean of its divisors is an integer number (187596250).

Almost surely, 2^712865731 is an apocalyptic number.

712865731 is a deficient number, since it is larger than the sum of its proper divisors (37519269).

712865731 is a wasteful number, since it uses less digits than its factorization.

712865731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37519268.

The product of its digits is 70560, while the sum is 40.

The square root of 712865731 is about 26699.5455204766. The cubic root of 712865731 is about 893.3107890310.

The spelling of 712865731 in words is "seven hundred twelve million, eight hundred sixty-five thousand, seven hundred thirty-one".