316732393 has 2 divisors, whose sum is σ = 316732394. Its totient is φ = 316732392.

The previous prime is 316732391. The next prime is 316732397. The reversal of 316732393 is 393237613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311593104 + 5139289 = 17652^2 + 2267^2 .

It is an emirp because it is prime and its reverse (393237613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316732393 - 2¹ = 316732391 is a prime.

Together with 316732391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (316732391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158366196 + 158366197.

It is an arithmetic number, because the mean of its divisors is an integer number (158366197).

Almost surely, 2^316732393 is an apocalyptic number.

It is an amenable number.

316732393 is a deficient number, since it is larger than the sum of its proper divisors (1).

316732393 is an equidigital number, since it uses as much as digits as its factorization.

316732393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 37.

The square root of 316732393 is about 17796.9770747731. The cubic root of 316732393 is about 681.6542717548.

The spelling of 316732393 in words is "three hundred sixteen million, seven hundred thirty-two thousand, three hundred ninety-three".