3981393315 has 12 divisors (see below), whose sum is σ = 6901081824. Its totient is φ = 2123409744.

The previous prime is 3981393307. The next prime is 3981393329. The reversal of 3981393315 is 5133931893.

It is not a de Polignac number, because 3981393315 - 2³ = 3981393307 is a prime.

It is a super-3 number, since 3×3981393315³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 88475407 = 3981393315 / (3 + 9 + 8 + 1 + 3 + 9 + 3 + 3 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44237659 + ... + 44237748.

It is an arithmetic number, because the mean of its divisors is an integer number (575090152).

Almost surely, 2^3981393315 is an apocalyptic number.

3981393315 is a deficient number, since it is larger than the sum of its proper divisors (2919688509).

3981393315 is a wasteful number, since it uses less digits than its factorization.

3981393315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88475418 (or 88475415 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 3981393315 is about 63098.2829798086. The cubic root of 3981393315 is about 1584.9358696566.

The spelling of 3981393315 in words is "three billion, nine hundred eighty-one million, three hundred ninety-three thousand, three hundred fifteen".