313887987 has 16 divisors (see below), whose sum is σ = 531450880. Its totient is φ = 179364456.

The previous prime is 313887943. The next prime is 313887997. The reversal of 313887987 is 789788313.

It is not a de Polignac number, because 313887987 - 2⁷ = 313887859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313887997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830203 + ... + 830580.

It is an arithmetic number, because the mean of its divisors is an integer number (33215680).

Almost surely, 2^313887987 is an apocalyptic number.

313887987 is a deficient number, since it is larger than the sum of its proper divisors (217562893).

313887987 is a wasteful number, since it uses less digits than its factorization.

313887987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660799 (or 1660793 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 313887987 is about 17716.8842351018. The cubic root of 313887987 is about 679.6076073800.

It can be divided in two parts, 3138 and 87987, that added together give a cube (91125 = 45³).

The spelling of 313887987 in words is "three hundred thirteen million, eight hundred eighty-seven thousand, nine hundred eighty-seven".