3987899315 has 4 divisors (see below), whose sum is σ = 4785479184. Its totient is φ = 3190319448.

The previous prime is 3987899291. The next prime is 3987899327. The reversal of 3987899315 is 5139987893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3987899315 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398789927 + ... + 398789936.

It is an arithmetic number, because the mean of its divisors is an integer number (1196369796).

Almost surely, 2^3987899315 is an apocalyptic number.

3987899315 is a deficient number, since it is larger than the sum of its proper divisors (797579869).

3987899315 is an equidigital number, since it uses as much as digits as its factorization.

3987899315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797579868.

The product of its digits is 14696640, while the sum is 62.

The square root of 3987899315 is about 63149.8164288702. The cubic root of 3987899315 is about 1585.7987150910.

The spelling of 3987899315 in words is "three billion, nine hundred eighty-seven million, eight hundred ninety-nine thousand, three hundred fifteen".