316587891 has 16 divisors (see below), whose sum is σ = 426452480. Its totient is φ = 208902240.

The previous prime is 316587877. The next prime is 316587941. The reversal of 316587891 is 198785613.

It is not a de Polignac number, because 316587891 - 2¹⁵ = 316555123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 316587891.

It is not an unprimeable number, because it can be changed into a prime (316587811) 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, 131325 + ... + 133713.

It is an arithmetic number, because the mean of its divisors is an integer number (26653280).

Almost surely, 2^316587891 is an apocalyptic number.

316587891 is a deficient number, since it is larger than the sum of its proper divisors (109864589).

316587891 is a wasteful number, since it uses less digits than its factorization.

316587891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826.

The product of its digits is 362880, while the sum is 48.

The square root of 316587891 is about 17792.9168772295. The cubic root of 316587891 is about 681.5505928647.

The spelling of 316587891 in words is "three hundred sixteen million, five hundred eighty-seven thousand, eight hundred ninety-one".