315604493 has 2 divisors, whose sum is σ = 315604494. Its totient is φ = 315604492.

The previous prime is 315604433. The next prime is 315604501. The reversal of 315604493 is 394406513.

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., 191905609 + 123698884 = 13853^2 + 11122^2 .

It is an emirp because it is prime and its reverse (394406513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315604493 - 2¹⁶ = 315538957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315604433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157802246 + 157802247.

It is an arithmetic number, because the mean of its divisors is an integer number (157802247).

Almost surely, 2^315604493 is an apocalyptic number.

It is an amenable number.

315604493 is a deficient number, since it is larger than the sum of its proper divisors (1).

315604493 is an equidigital number, since it uses as much as digits as its factorization.

315604493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 315604493 is about 17765.2608480709. The cubic root of 315604493 is about 680.8441743315.

The spelling of 315604493 in words is "three hundred fifteen million, six hundred four thousand, four hundred ninety-three".