731868313 has 4 divisors (see below), whose sum is σ = 798401808. Its totient is φ = 665334820.

The previous prime is 731868307. The next prime is 731868317. The reversal of 731868313 is 313868137.

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 not a de Polignac number, because 731868313 - 2¹⁷ = 731737241 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731868317) 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, 33266731 + ... + 33266752.

It is an arithmetic number, because the mean of its divisors is an integer number (199600452).

Almost surely, 2^731868313 is an apocalyptic number.

It is an amenable number.

731868313 is a deficient number, since it is larger than the sum of its proper divisors (66533495).

731868313 is a wasteful number, since it uses less digits than its factorization.

731868313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66533494.

The product of its digits is 72576, while the sum is 40.

The square root of 731868313 is about 27053.0647616864. The cubic root of 731868313 is about 901.1788309988.

The spelling of 731868313 in words is "seven hundred thirty-one million, eight hundred sixty-eight thousand, three hundred thirteen".