117800091 has 12 divisors (see below), whose sum is σ = 174113368. Its totient is φ = 76706784.

The previous prime is 117800087. The next prime is 117800099. The reversal of 117800091 is 190008711.

It is not a de Polignac number, because 117800091 - 2² = 117800087 is a prime.

It is a super-2 number, since 2×117800091² = 27753722879216562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117800099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151810 + ... + 152583.

Almost surely, 2^117800091 is an apocalyptic number.

117800091 is a deficient number, since it is larger than the sum of its proper divisors (56313277).

117800091 is a wasteful number, since it uses less digits than its factorization.

117800091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304442 (or 304439 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 117800091 is about 10853.5750331400. The cubic root of 117800091 is about 490.2096714792.

The spelling of 117800091 in words is "one hundred seventeen million, eight hundred thousand, ninety-one".