1317957916 has 24 divisors (see below), whose sum is σ = 2517759216. Its totient is φ = 598677120.

The previous prime is 1317957911. The next prime is 1317957923. The reversal of 1317957916 is 6197597131.

It is a self number, because there is not a number n which added to its sum of digits gives 1317957916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317957911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63870 + ... + 81946.

It is an arithmetic number, because the mean of its divisors is an integer number (104906634).

Almost surely, 2^1317957916 is an apocalyptic number.

It is an amenable number.

1317957916 is a deficient number, since it is larger than the sum of its proper divisors (1199801300).

1317957916 is a wasteful number, since it uses less digits than its factorization.

1317957916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19749 (or 19747 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 1317957916 is about 36303.6901154690. The cubic root of 1317957916 is about 1096.3953399568.

The spelling of 1317957916 in words is "one billion, three hundred seventeen million, nine hundred fifty-seven thousand, nine hundred sixteen".