1117355891 has 2 divisors, whose sum is σ = 1117355892. Its totient is φ = 1117355890.

The previous prime is 1117355887. The next prime is 1117355959. The reversal of 1117355891 is 1985537111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1985537111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117355891 - 2² = 1117355887 is a prime.

It is not a weakly prime, because it can be changed into another prime (1117355861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558677945 + 558677946.

It is an arithmetic number, because the mean of its divisors is an integer number (558677946).

Almost surely, 2^1117355891 is an apocalyptic number.

1117355891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117355891 is an equidigital number, since it uses as much as digits as its factorization.

1117355891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 41.

The square root of 1117355891 is about 33426.8737844268. The cubic root of 1117355891 is about 1037.6809430577.

The spelling of 1117355891 in words is "one billion, one hundred seventeen million, three hundred fifty-five thousand, eight hundred ninety-one".