313020987 has 8 divisors (see below), whose sum is σ = 426241536. Its totient is φ = 204240552.

The previous prime is 313020973. The next prime is 313020997. The reversal of 313020987 is 789020313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-313020987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313020907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109863 + ... + 1110144.

It is an arithmetic number, because the mean of its divisors is an integer number (53280192).

Almost surely, 2^313020987 is an apocalyptic number.

313020987 is a deficient number, since it is larger than the sum of its proper divisors (113220549).

313020987 is a wasteful number, since it uses less digits than its factorization.

313020987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220057.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 313020987 is about 17692.3991307002. The cubic root of 313020987 is about 678.9813084508.

The spelling of 313020987 in words is "three hundred thirteen million, twenty thousand, nine hundred eighty-seven".