117909111 has 4 divisors (see below), whose sum is σ = 157212152. Its totient is φ = 78606072.

The previous prime is 117909107. The next prime is 117909131. The reversal of 117909111 is 111909711.

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

It is not a de Polignac number, because 117909111 - 2² = 117909107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117909131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19651516 + ... + 19651521.

It is an arithmetic number, because the mean of its divisors is an integer number (39303038).

Almost surely, 2^117909111 is an apocalyptic number.

117909111 is a deficient number, since it is larger than the sum of its proper divisors (39303041).

117909111 is an equidigital number, since it uses as much as digits as its factorization.

117909111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39303040.

The product of its (nonzero) digits is 567, while the sum is 30.

The square root of 117909111 is about 10858.5961799857. The cubic root of 117909111 is about 490.3608490092.

The spelling of 117909111 in words is "one hundred seventeen million, nine hundred nine thousand, one hundred eleven".