117909907 has 4 divisors (see below), whose sum is σ = 119908440. Its totient is φ = 115911376.

The previous prime is 117909901. The next prime is 117909923. The reversal of 117909907 is 709909711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117909907 - 2³ = 117909899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117909901) 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 in 3 ways as a sum of consecutive naturals, for example, 999178 + ... + 999295.

It is an arithmetic number, because the mean of its divisors is an integer number (29977110).

Almost surely, 2^117909907 is an apocalyptic number.

117909907 is a deficient number, since it is larger than the sum of its proper divisors (1998533).

117909907 is an equidigital number, since it uses as much as digits as its factorization.

117909907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998532.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 117909907 is about 10858.6328329123. The cubic root of 117909907 is about 490.3619524760.

The spelling of 117909907 in words is "one hundred seventeen million, nine hundred nine thousand, nine hundred seven".