117920911 has 2 divisors, whose sum is σ = 117920912. Its totient is φ = 117920910.

The previous prime is 117920909. The next prime is 117920939. The reversal of 117920911 is 119029711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (119029711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117920911 - 2¹ = 117920909 is a prime.

Together with 117920909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117920981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58960455 + 58960456.

It is an arithmetic number, because the mean of its divisors is an integer number (58960456).

Almost surely, 2^117920911 is an apocalyptic number.

117920911 is a deficient number, since it is larger than the sum of its proper divisors (1).

117920911 is an equidigital number, since it uses as much as digits as its factorization.

117920911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 117920911 is about 10859.1395147129. The cubic root of 117920911 is about 490.3772064249.

The spelling of 117920911 in words is "one hundred seventeen million, nine hundred twenty thousand, nine hundred eleven".