1317900866 has 4 divisors (see below), whose sum is σ = 1976851302. Its totient is φ = 658950432.

The previous prime is 1317900833. The next prime is 1317900887. The reversal of 1317900866 is 6680097131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680097131 = 1499 ⋅4456369.

It can be written as a sum of positive squares in only one way, i.e., 767013025 + 550887841 = 27695^2 + 23471^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 329475215 + ... + 329475218.

Almost surely, 2^1317900866 is an apocalyptic number.

1317900866 is a deficient number, since it is larger than the sum of its proper divisors (658950436).

1317900866 is an equidigital number, since it uses as much as digits as its factorization.

1317900866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658950435.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1317900866 is about 36302.9043741682. The cubic root of 1317900866 is about 1096.3795199634.

Adding to 1317900866 its reverse (6680097131), we get a palindrome (7997997997).

The spelling of 1317900866 in words is "one billion, three hundred seventeen million, nine hundred thousand, eight hundred sixty-six".