315938489 has 4 divisors (see below), whose sum is σ = 334523124. Its totient is φ = 297353856.

The previous prime is 315938477. The next prime is 315938503. The reversal of 315938489 is 984839513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984839513 = 7 ⋅140691359.

It can be written as a sum of positive squares in 2 ways, for example, as 187909264 + 128029225 = 13708^2 + 11315^2 .

It is a cyclic number.

It is not a de Polignac number, because 315938489 - 2⁴ = 315938473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315932489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9292292 + ... + 9292325.

It is an arithmetic number, because the mean of its divisors is an integer number (83630781).

Almost surely, 2^315938489 is an apocalyptic number.

It is an amenable number.

315938489 is a deficient number, since it is larger than the sum of its proper divisors (18584635).

315938489 is a wasteful number, since it uses less digits than its factorization.

315938489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18584634.

The product of its digits is 933120, while the sum is 50.

The square root of 315938489 is about 17774.6586183814. The cubic root of 315938489 is about 681.0842628665.

The spelling of 315938489 in words is "three hundred fifteen million, nine hundred thirty-eight thousand, four hundred eighty-nine".