117681399 has 24 divisors (see below), whose sum is σ = 186116112. Its totient is φ = 71061120.

The previous prime is 117681379. The next prime is 117681437. The reversal of 117681399 is 993186711.

It is not a de Polignac number, because 117681399 - 2⁵ = 117681367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117681379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26979 + ... + 31035.

It is an arithmetic number, because the mean of its divisors is an integer number (7754838).

Almost surely, 2^117681399 is an apocalyptic number.

117681399 is a deficient number, since it is larger than the sum of its proper divisors (68434713).

117681399 is a wasteful number, since it uses less digits than its factorization.

117681399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367 (or 4364 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 117681399 is about 10848.1057793515. The cubic root of 117681399 is about 490.0449757412.

The spelling of 117681399 in words is "one hundred seventeen million, six hundred eighty-one thousand, three hundred ninety-nine".