312716986 has 8 divisors (see below), whose sum is σ = 474346260. Its totient is φ = 154601568.

The previous prime is 312716977. The next prime is 312717017. The reversal of 312716986 is 689617213.

It can be written as a sum of positive squares in 2 ways, for example, as 312617761 + 99225 = 17681^2 + 315^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878241 + ... + 878596.

Almost surely, 2^312716986 is an apocalyptic number.

312716986 is a deficient number, since it is larger than the sum of its proper divisors (161629274).

312716986 is a wasteful number, since it uses less digits than its factorization.

312716986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756928.

The product of its digits is 108864, while the sum is 43.

The square root of 312716986 is about 17683.8057555493. The cubic root of 312716986 is about 678.7614319756.

The spelling of 312716986 in words is "three hundred twelve million, seven hundred sixteen thousand, nine hundred eighty-six".