117920939 has 2 divisors, whose sum is σ = 117920940. Its totient is φ = 117920938.

The previous prime is 117920911. The next prime is 117920947. The reversal of 117920939 is 939029711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117920939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 117920896 and 117920905.

It is not a weakly prime, because it can be changed into another prime (117920909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58960469 + 58960470.

It is an arithmetic number, because the mean of its divisors is an integer number (58960470).

Almost surely, 2^117920939 is an apocalyptic number.

117920939 is a deficient number, since it is larger than the sum of its proper divisors (1).

117920939 is an equidigital number, since it uses as much as digits as its factorization.

117920939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 117920939 is about 10859.1408039495. The cubic root of 117920939 is about 490.3772452378.

The spelling of 117920939 in words is "one hundred seventeen million, nine hundred twenty thousand, nine hundred thirty-nine".