117831983 has 2 divisors, whose sum is σ = 117831984. Its totient is φ = 117831982.

The previous prime is 117831979. The next prime is 117832007. The reversal of 117831983 is 389138711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117831983 - 2² = 117831979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117831983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117833983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58915991 + 58915992.

It is an arithmetic number, because the mean of its divisors is an integer number (58915992).

Almost surely, 2^117831983 is an apocalyptic number.

117831983 is a deficient number, since it is larger than the sum of its proper divisors (1).

117831983 is an equidigital number, since it uses as much as digits as its factorization.

117831983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 117831983 is about 10855.0441270407. The cubic root of 117831983 is about 490.2539056165.

The spelling of 117831983 in words is "one hundred seventeen million, eight hundred thirty-one thousand, nine hundred eighty-three".