313122987 has 12 divisors (see below), whose sum is σ = 456681264. Its totient is φ = 206721360.

The previous prime is 313122913. The next prime is 313123001. The reversal of 313122987 is 789221313.

It is not a de Polignac number, because 313122987 - 2¹¹ = 313120939 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (313122287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167964 + ... + 169817.

It is an arithmetic number, because the mean of its divisors is an integer number (38056772).

Almost surely, 2^313122987 is an apocalyptic number.

313122987 is a deficient number, since it is larger than the sum of its proper divisors (143558277).

313122987 is a wasteful number, since it uses less digits than its factorization.

313122987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337890 (or 337887 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 313122987 is about 17695.2814897079. The cubic root of 313122987 is about 679.0550506546.

The spelling of 313122987 in words is "three hundred thirteen million, one hundred twenty-two thousand, nine hundred eighty-seven".