117931399 has 4 divisors (see below), whose sum is σ = 118009960. Its totient is φ = 117852840.

The previous prime is 117931391. The next prime is 117931403. The reversal of 117931399 is 993139711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117931399 - 2³ = 117931391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117931391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36984 + ... + 40045.

It is an arithmetic number, because the mean of its divisors is an integer number (29502490).

Almost surely, 2^117931399 is an apocalyptic number.

117931399 is a deficient number, since it is larger than the sum of its proper divisors (78561).

117931399 is an equidigital number, since it uses as much as digits as its factorization.

117931399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78560.

The product of its digits is 45927, while the sum is 43.

The square root of 117931399 is about 10859.6224151671. The cubic root of 117931399 is about 490.3917442017.

The spelling of 117931399 in words is "one hundred seventeen million, nine hundred thirty-one thousand, three hundred ninety-nine".