317131639 has 4 divisors (see below), whose sum is σ = 345961800. Its totient is φ = 288301480.

The previous prime is 317131631. The next prime is 317131649. The reversal of 317131639 is 936131713.

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 317131639 - 2³ = 317131631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317131631) 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, 14415064 + ... + 14415085.

It is an arithmetic number, because the mean of its divisors is an integer number (86490450).

Almost surely, 2^317131639 is an apocalyptic number.

317131639 is a deficient number, since it is larger than the sum of its proper divisors (28830161).

317131639 is a wasteful number, since it uses less digits than its factorization.

317131639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28830160.

The product of its digits is 10206, while the sum is 34.

The square root of 317131639 is about 17808.1902224791. The cubic root of 317131639 is about 681.9405633568.

The spelling of 317131639 in words is "three hundred seventeen million, one hundred thirty-one thousand, six hundred thirty-nine".