1317957894 has 36 divisors (see below), whose sum is σ = 3138778188. Its totient is φ = 399380520.

The previous prime is 1317957881. The next prime is 1317957899. The reversal of 1317957894 is 4987597131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1317957894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317957899) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 300384 + ... + 304739.

It is an arithmetic number, because the mean of its divisors is an integer number (87188283).

Almost surely, 2^1317957894 is an apocalyptic number.

1317957894 is an abundant number, since it is smaller than the sum of its proper divisors (1820820294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317957894 is a wasteful number, since it uses less digits than its factorization.

1317957894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605153 (or 605139 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 1317957894 is about 36303.6898124695. The cubic root of 1317957894 is about 1096.3953338563.

The spelling of 1317957894 in words is "one billion, three hundred seventeen million, nine hundred fifty-seven thousand, eight hundred ninety-four".