316987 has 4 divisors (see below), whose sum is σ = 345816. Its totient is φ = 288160.

The previous prime is 316961. The next prime is 316991. The reversal of 316987 is 789613.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 316987 - 2⁷ = 316859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14398 + ... + 14419.

It is an arithmetic number, because the mean of its divisors is an integer number (86454).

2³¹⁶⁹⁸⁷ is an apocalyptic number.

316987 is a deficient number, since it is larger than the sum of its proper divisors (28829).

316987 is a wasteful number, since it uses less digits than its factorization.

316987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28828.

The product of its digits is 9072, while the sum is 34.

The square root of 316987 is about 563.0159855635. The cubic root of 316987 is about 68.1836873292.

The spelling of 316987 in words is "three hundred sixteen thousand, nine hundred eighty-seven".