117838907 has 2 divisors, whose sum is σ = 117838908. Its totient is φ = 117838906.

The previous prime is 117838891. The next prime is 117838909. The reversal of 117838907 is 709838711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117838907 - 2⁴ = 117838891 is a prime.

Together with 117838909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117838909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58919453 + 58919454.

It is an arithmetic number, because the mean of its divisors is an integer number (58919454).

Almost surely, 2^117838907 is an apocalyptic number.

117838907 is a deficient number, since it is larger than the sum of its proper divisors (1).

117838907 is an equidigital number, since it uses as much as digits as its factorization.

117838907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 117838907 is about 10855.3630524271. The cubic root of 117838907 is about 490.2635081355.

The spelling of 117838907 in words is "one hundred seventeen million, eight hundred thirty-eight thousand, nine hundred seven".