317949 has 4 divisors (see below), whose sum is σ = 423936. Its totient is φ = 211964.

The previous prime is 317923. The next prime is 317957. The reversal of 317949 is 949713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949713 = 3 ⋅316571.

It is a cyclic number.

It is not a de Polignac number, because 317949 - 2⁸ = 317693 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 317949.

It is not an unprimeable number, because it can be changed into a prime (317959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52989 + ... + 52994.

It is an arithmetic number, because the mean of its divisors is an integer number (105984).

2³¹⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

317949 is a deficient number, since it is larger than the sum of its proper divisors (105987).

317949 is a wasteful number, since it uses less digits than its factorization.

317949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105986.

The product of its digits is 6804, while the sum is 33.

The square root of 317949 is about 563.8696657917. The cubic root of 317949 is about 68.2525928519.

It can be divided in two parts, 31794 and 9, that multiplied together give a triangular number (286146 = T₇₅₆).

The spelling of 317949 in words is "three hundred seventeen thousand, nine hundred forty-nine".