726156731 has 4 divisors (see below), whose sum is σ = 726526752. Its totient is φ = 725786712.

The previous prime is 726156727. The next prime is 726156733. The reversal of 726156731 is 137651627.

726156731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 726156731 - 2² = 726156727 is a prime.

It is a super-2 number, since 2×726156731² = 1054607195953212722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726156733) 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, 182051 + ... + 185996.

It is an arithmetic number, because the mean of its divisors is an integer number (181631688).

Almost surely, 2^726156731 is an apocalyptic number.

726156731 is a deficient number, since it is larger than the sum of its proper divisors (370021).

726156731 is a wasteful number, since it uses less digits than its factorization.

726156731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370020.

The product of its digits is 52920, while the sum is 38.

The square root of 726156731 is about 26947.2954301540. The cubic root of 726156731 is about 898.8284059672.

The spelling of 726156731 in words is "seven hundred twenty-six million, one hundred fifty-six thousand, seven hundred thirty-one".