117809739 has 12 divisors (see below), whose sum is σ = 174769296. Its totient is φ = 76416912.

The previous prime is 117809729. The next prime is 117809753. The reversal of 117809739 is 937908711.

It is not a de Polignac number, because 117809739 - 2¹¹ = 117807691 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 117809694 and 117809703.

It is not an unprimeable number, because it can be changed into a prime (117809719) 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, 176559 + ... + 177224.

It is an arithmetic number, because the mean of its divisors is an integer number (14564108).

Almost surely, 2^117809739 is an apocalyptic number.

117809739 is a deficient number, since it is larger than the sum of its proper divisors (56959557).

117809739 is a wasteful number, since it uses less digits than its factorization.

117809739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353826 (or 353823 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 117809739 is about 10854.0194858863. The cubic root of 117809739 is about 490.2230540772.

The spelling of 117809739 in words is "one hundred seventeen million, eight hundred nine thousand, seven hundred thirty-nine".