315702649 has 2 divisors, whose sum is σ = 315702650. Its totient is φ = 315702648.

The previous prime is 315702637. The next prime is 315702659. The reversal of 315702649 is 946207513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302064400 + 13638249 = 17380^2 + 3693^2 .

It is a cyclic number.

It is not a de Polignac number, because 315702649 - 2⁵ = 315702617 is a prime.

It is not a weakly prime, because it can be changed into another prime (315702659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157851324 + 157851325.

It is an arithmetic number, because the mean of its divisors is an integer number (157851325).

Almost surely, 2^315702649 is an apocalyptic number.

It is an amenable number.

315702649 is a deficient number, since it is larger than the sum of its proper divisors (1).

315702649 is an equidigital number, since it uses as much as digits as its factorization.

315702649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 315702649 is about 17768.0232158786. The cubic root of 315702649 is about 680.9147500207.

The spelling of 315702649 in words is "three hundred fifteen million, seven hundred two thousand, six hundred forty-nine".