319947723 has 12 divisors (see below), whose sum is σ = 473419128. Its totient is φ = 208095840.

The previous prime is 319947721. The next prime is 319947731. The reversal of 319947723 is 327749913.

It is not a de Polignac number, because 319947723 - 2¹ = 319947721 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (319947721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 433165 + ... + 433902.

It is an arithmetic number, because the mean of its divisors is an integer number (39451594).

Almost surely, 2^319947723 is an apocalyptic number.

319947723 is a deficient number, since it is larger than the sum of its proper divisors (153471405).

319947723 is a wasteful number, since it uses less digits than its factorization.

319947723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867114 (or 867111 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 319947723 is about 17887.0825737458. The cubic root of 319947723 is about 683.9531298036.

The spelling of 319947723 in words is "three hundred nineteen million, nine hundred forty-seven thousand, seven hundred twenty-three".