315137893 has 4 divisors (see below), whose sum is σ = 360157600. Its totient is φ = 270118188.

The previous prime is 315137741. The next prime is 315137897. The reversal of 315137893 is 398731513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 398731513 = 137 ⋅2910449.

It is a cyclic number.

It is not a de Polignac number, because 315137893 - 2¹³ = 315129701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315137897) 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, 22509843 + ... + 22509856.

It is an arithmetic number, because the mean of its divisors is an integer number (90039400).

Almost surely, 2^315137893 is an apocalyptic number.

It is an amenable number.

315137893 is a deficient number, since it is larger than the sum of its proper divisors (45019707).

315137893 is an equidigital number, since it uses as much as digits as its factorization.

315137893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45019706.

The product of its digits is 68040, while the sum is 40.

The square root of 315137893 is about 17752.1236194434. The cubic root of 315137893 is about 680.5084814156.

The spelling of 315137893 in words is "three hundred fifteen million, one hundred thirty-seven thousand, eight hundred ninety-three".