312399985 has 8 divisors (see below), whose sum is σ = 381234240. Its totient is φ = 245683824.

The previous prime is 312399937. The next prime is 312400001. The reversal of 312399985 is 589993213.

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

It is a cyclic number.

It is not a de Polignac number, because 312399985 - 2²¹ = 310302833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529197 + ... + 529786.

It is an arithmetic number, because the mean of its divisors is an integer number (47654280).

Almost surely, 2^312399985 is an apocalyptic number.

It is an amenable number.

312399985 is a deficient number, since it is larger than the sum of its proper divisors (68834255).

312399985 is a wasteful number, since it uses less digits than its factorization.

312399985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059047.

The product of its digits is 524880, while the sum is 49.

The square root of 312399985 is about 17674.8404518966. The cubic root of 312399985 is about 678.5320010966.

The spelling of 312399985 in words is "three hundred twelve million, three hundred ninety-nine thousand, nine hundred eighty-five".