117351891 has 6 divisors (see below), whose sum is σ = 169508300. Its totient is φ = 78234588.

The previous prime is 117351869. The next prime is 117351919. The reversal of 117351891 is 198153711.

It is not a de Polignac number, because 117351891 - 2⁹ = 117351379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117351811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6519541 + ... + 6519558.

Almost surely, 2^117351891 is an apocalyptic number.

117351891 is a deficient number, since it is larger than the sum of its proper divisors (52156409).

117351891 is a wasteful number, since it uses less digits than its factorization.

117351891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039105 (or 13039102 counting only the distinct ones).

The product of its digits is 7560, while the sum is 36.

The square root of 117351891 is about 10832.9077813854. The cubic root of 117351891 is about 489.5871727664.

The spelling of 117351891 in words is "one hundred seventeen million, three hundred fifty-one thousand, eight hundred ninety-one".