117909901 has 2 divisors, whose sum is σ = 117909902. Its totient is φ = 117909900.

The previous prime is 117909899. The next prime is 117909923. The reversal of 117909901 is 109909711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101989801 + 15920100 = 10099^2 + 3990^2 .

It is a cyclic number.

It is not a de Polignac number, because 117909901 - 2¹ = 117909899 is a prime.

Together with 117909899, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117909931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58954950 + 58954951.

It is an arithmetic number, because the mean of its divisors is an integer number (58954951).

Almost surely, 2^117909901 is an apocalyptic number.

It is an amenable number.

117909901 is a deficient number, since it is larger than the sum of its proper divisors (1).

117909901 is an equidigital number, since it uses as much as digits as its factorization.

117909901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 117909901 is about 10858.6325566344. The cubic root of 117909901 is about 490.3619441584.

The spelling of 117909901 in words is "one hundred seventeen million, nine hundred nine thousand, nine hundred one".