312243987 has 16 divisors (see below), whose sum is σ = 465252480. Its totient is φ = 184622400.

The previous prime is 312243979. The next prime is 312244003. The reversal of 312243987 is 789342213.

It is not a de Polignac number, because 312243987 - 2³ = 312243979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312243917) 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, 114037 + ... + 116742.

It is an arithmetic number, because the mean of its divisors is an integer number (29078280).

Almost surely, 2^312243987 is an apocalyptic number.

312243987 is a deficient number, since it is larger than the sum of its proper divisors (153008493).

312243987 is a wasteful number, since it uses less digits than its factorization.

312243987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230834.

The product of its digits is 72576, while the sum is 39.

The square root of 312243987 is about 17670.4269048600. The cubic root of 312243987 is about 678.4190398675.

The spelling of 312243987 in words is "three hundred twelve million, two hundred forty-three thousand, nine hundred eighty-seven".