316491387 has 8 divisors (see below), whose sum is σ = 426730320. Its totient is φ = 208623360.

The previous prime is 316491361. The next prime is 316491401. The reversal of 316491387 is 783194613.

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

It is not a de Polignac number, because 316491387 - 2⁶ = 316491323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (316491337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592414 + ... + 592947.

It is an arithmetic number, because the mean of its divisors is an integer number (53341290).

Almost surely, 2^316491387 is an apocalyptic number.

316491387 is a deficient number, since it is larger than the sum of its proper divisors (110238933).

316491387 is a wasteful number, since it uses less digits than its factorization.

316491387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185453.

The product of its digits is 108864, while the sum is 42.

The square root of 316491387 is about 17790.2048048919. The cubic root of 316491387 is about 681.4813345382.

The spelling of 316491387 in words is "three hundred sixteen million, four hundred ninety-one thousand, three hundred eighty-seven".