317139782 has 4 divisors (see below), whose sum is σ = 475709676. Its totient is φ = 158569890.

The previous prime is 317139769. The next prime is 317139787. The reversal of 317139782 is 287931713.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317139787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79284944 + ... + 79284947.

It is an arithmetic number, because the mean of its divisors is an integer number (118927419).

Almost surely, 2^317139782 is an apocalyptic number.

317139782 is a deficient number, since it is larger than the sum of its proper divisors (158569894).

317139782 is a wasteful number, since it uses less digits than its factorization.

317139782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158569893.

The product of its digits is 63504, while the sum is 41.

The square root of 317139782 is about 17808.4188517678. The cubic root of 317139782 is about 681.9464000439.

The spelling of 317139782 in words is "three hundred seventeen million, one hundred thirty-nine thousand, seven hundred eighty-two".