315813349 has 2 divisors, whose sum is σ = 315813350. Its totient is φ = 315813348.

The previous prime is 315813331. The next prime is 315813419. The reversal of 315813349 is 943318513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233784100 + 82029249 = 15290^2 + 9057^2 .

It is a cyclic number.

It is not a de Polignac number, because 315813349 - 2⁵ = 315813317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315813319) 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, 157906674 + 157906675.

It is an arithmetic number, because the mean of its divisors is an integer number (157906675).

Almost surely, 2^315813349 is an apocalyptic number.

It is an amenable number.

315813349 is a deficient number, since it is larger than the sum of its proper divisors (1).

315813349 is an equidigital number, since it uses as much as digits as its factorization.

315813349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 315813349 is about 17771.1380896104. The cubic root of 315813349 is about 680.9943274907.

The spelling of 315813349 in words is "three hundred fifteen million, eight hundred thirteen thousand, three hundred forty-nine".