117691390 has 16 divisors (see below), whose sum is σ = 212693040. Its totient is φ = 46888000.

The previous prime is 117691349. The next prime is 117691397. The reversal of 117691390 is 93196711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117691397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20935 + ... + 25954.

It is an arithmetic number, because the mean of its divisors is an integer number (13293315).

Almost surely, 2^117691390 is an apocalyptic number.

117691390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117691390 is a deficient number, since it is larger than the sum of its proper divisors (95001650).

117691390 is a wasteful number, since it uses less digits than its factorization.

117691390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47147.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 117691390 is about 10848.5662647190. The cubic root of 117691390 is about 490.0588434123.

The spelling of 117691390 in words is "one hundred seventeen million, six hundred ninety-one thousand, three hundred ninety".