317434987 has 4 divisors (see below), whose sum is σ = 324817240. Its totient is φ = 310052736.

The previous prime is 317434973. The next prime is 317435047. The reversal of 317434987 is 789434713.

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 317434987 - 2¹¹ = 317432939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317434687) 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 3 ways as a sum of consecutive naturals, for example, 3691062 + ... + 3691147.

It is an arithmetic number, because the mean of its divisors is an integer number (81204310).

Almost surely, 2^317434987 is an apocalyptic number.

317434987 is a deficient number, since it is larger than the sum of its proper divisors (7382253).

317434987 is an equidigital number, since it uses as much as digits as its factorization.

317434987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7382252.

The product of its digits is 508032, while the sum is 46.

The square root of 317434987 is about 17816.7052790352. The cubic root of 317434987 is about 682.1579277543.

The spelling of 317434987 in words is "three hundred seventeen million, four hundred thirty-four thousand, nine hundred eighty-seven".