726413731 has 4 divisors (see below), whose sum is σ = 749846464. Its totient is φ = 702981000.

The previous prime is 726413693. The next prime is 726413741. The reversal of 726413731 is 137314627.

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 726413731 - 2¹⁷ = 726282659 is a prime.

It is a super-2 number, since 2×726413731² = 1055353817170680722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726413741) 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, 11716320 + ... + 11716381.

It is an arithmetic number, because the mean of its divisors is an integer number (187461616).

Almost surely, 2^726413731 is an apocalyptic number.

726413731 is a deficient number, since it is larger than the sum of its proper divisors (23432733).

726413731 is a wasteful number, since it uses less digits than its factorization.

726413731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23432732.

The product of its digits is 21168, while the sum is 34.

The square root of 726413731 is about 26952.0635759120. The cubic root of 726413731 is about 898.9344306697.

The spelling of 726413731 in words is "seven hundred twenty-six million, four hundred thirteen thousand, seven hundred thirty-one".