117691690 has 16 divisors (see below), whose sum is σ = 221056128. Its totient is φ = 45029776.

The previous prime is 117691669. The next prime is 117691699. The reversal of 117691690 is 96196711.

It is a super-2 number, since 2×117691690² = 27702667790112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117691699) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 255622 + ... + 256081.

It is an arithmetic number, because the mean of its divisors is an integer number (13816008).

Almost surely, 2^117691690 is an apocalyptic number.

117691690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117691690 is a deficient number, since it is larger than the sum of its proper divisors (103364438).

117691690 is a wasteful number, since it uses less digits than its factorization.

117691690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511733.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 117691690 is about 10848.5800914221. The cubic root of 117691690 is about 490.0592598050.

The spelling of 117691690 in words is "one hundred seventeen million, six hundred ninety-one thousand, six hundred ninety".