316799993 has 2 divisors, whose sum is σ = 316799994. Its totient is φ = 316799992.

The previous prime is 316799983. The next prime is 316800007. The reversal of 316799993 is 399997613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191628649 + 125171344 = 13843^2 + 11188^2 .

It is an emirp because it is prime and its reverse (399997613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316799993 - 2⁸ = 316799737 is a prime.

It is not a weakly prime, because it can be changed into another prime (316799983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158399996 + 158399997.

It is an arithmetic number, because the mean of its divisors is an integer number (158399997).

Almost surely, 2^316799993 is an apocalyptic number.

It is an amenable number.

316799993 is a deficient number, since it is larger than the sum of its proper divisors (1).

316799993 is an equidigital number, since it uses as much as digits as its factorization.

316799993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 56.

The square root of 316799993 is about 17798.8761723880. The cubic root of 316799993 is about 681.7027633225.

The spelling of 316799993 in words is "three hundred sixteen million, seven hundred ninety-nine thousand, nine hundred ninety-three".