11317883891 has 2 divisors, whose sum is σ = 11317883892. Its totient is φ = 11317883890.

The previous prime is 11317883869. The next prime is 11317883893. The reversal of 11317883891 is 19838871311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11317883891 - 2²² = 11313689587 is a prime.

Together with 11317883893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11317883893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5658941945 + 5658941946.

It is an arithmetic number, because the mean of its divisors is an integer number (5658941946).

Almost surely, 2^11317883891 is an apocalyptic number.

11317883891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11317883891 is an equidigital number, since it uses as much as digits as its factorization.

11317883891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 50.

The spelling of 11317883891 in words is "eleven billion, three hundred seventeen million, eight hundred eighty-three thousand, eight hundred ninety-one".