316927721 has 8 divisors (see below), whose sum is σ = 353096064. Its totient is φ = 281985520.

The previous prime is 316927711. The next prime is 316927727. The reversal of 316927721 is 127729613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 316927721 - 2¹⁸ = 316665577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316927727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305990 + ... + 307023.

It is an arithmetic number, because the mean of its divisors is an integer number (44137008).

Almost surely, 2^316927721 is an apocalyptic number.

It is an amenable number.

316927721 is a deficient number, since it is larger than the sum of its proper divisors (36168343).

316927721 is a wasteful number, since it uses less digits than its factorization.

316927721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613071.

The product of its digits is 31752, while the sum is 38.

The square root of 316927721 is about 17802.4639025052. The cubic root of 316927721 is about 681.7943677344.

The spelling of 316927721 in words is "three hundred sixteen million, nine hundred twenty-seven thousand, seven hundred twenty-one".