315420409 has 2 divisors, whose sum is σ = 315420410. Its totient is φ = 315420408.

The previous prime is 315420401. The next prime is 315420419. The reversal of 315420409 is 904024513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315417600 + 2809 = 17760^2 + 53^2 .

It is a cyclic number.

It is not a de Polignac number, because 315420409 - 2³ = 315420401 is a prime.

It is not a weakly prime, because it can be changed into another prime (315420401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157710204 + 157710205.

It is an arithmetic number, because the mean of its divisors is an integer number (157710205).

Almost surely, 2^315420409 is an apocalyptic number.

It is an amenable number.

315420409 is a deficient number, since it is larger than the sum of its proper divisors (1).

315420409 is an equidigital number, since it uses as much as digits as its factorization.

315420409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 315420409 is about 17760.0790820311. The cubic root of 315420409 is about 680.7117756094.

The spelling of 315420409 in words is "three hundred fifteen million, four hundred twenty thousand, four hundred nine".