117921927 has 4 divisors (see below), whose sum is σ = 157229240. Its totient is φ = 78614616.

The previous prime is 117921907. The next prime is 117921929. The reversal of 117921927 is 729129711.

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

It is not a de Polignac number, because 117921927 - 2¹⁰ = 117920903 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 (117921929) 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, 19653652 + ... + 19653657.

It is an arithmetic number, because the mean of its divisors is an integer number (39307310).

Almost surely, 2^117921927 is an apocalyptic number.

117921927 is a deficient number, since it is larger than the sum of its proper divisors (39307313).

117921927 is an equidigital number, since it uses as much as digits as its factorization.

117921927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39307312.

The product of its digits is 15876, while the sum is 39.

The square root of 117921927 is about 10859.1862954827. The cubic root of 117921927 is about 490.3786147751.

The spelling of 117921927 in words is "one hundred seventeen million, nine hundred twenty-one thousand, nine hundred twenty-seven".