315123793 has 2 divisors, whose sum is σ = 315123794. Its totient is φ = 315123792.

The previous prime is 315123769. The next prime is 315123799. The reversal of 315123793 is 397321513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251634769 + 63489024 = 15863^2 + 7968^2 .

It is a cyclic number.

It is not a de Polignac number, because 315123793 - 2²¹ = 313026641 is a prime.

It is not a weakly prime, because it can be changed into another prime (315123799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157561896 + 157561897.

It is an arithmetic number, because the mean of its divisors is an integer number (157561897).

Almost surely, 2^315123793 is an apocalyptic number.

It is an amenable number.

315123793 is a deficient number, since it is larger than the sum of its proper divisors (1).

315123793 is an equidigital number, since it uses as much as digits as its factorization.

315123793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 34.

The square root of 315123793 is about 17751.7264794160. The cubic root of 315123793 is about 680.4983320885.

The spelling of 315123793 in words is "three hundred fifteen million, one hundred twenty-three thousand, seven hundred ninety-three".