117891146 has 16 divisors (see below), whose sum is σ = 184852800. Its totient is φ = 56282688.

The previous prime is 117891089. The next prime is 117891149. The reversal of 117891146 is 641198711.

It is not an unprimeable number, because it can be changed into a prime (117891149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28370 + ... + 32258.

It is an arithmetic number, because the mean of its divisors is an integer number (11553300).

Almost surely, 2^117891146 is an apocalyptic number.

117891146 is a deficient number, since it is larger than the sum of its proper divisors (66961654).

117891146 is a wasteful number, since it uses less digits than its factorization.

117891146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573.

The product of its digits is 12096, while the sum is 38.

The square root of 117891146 is about 10857.7689236786. The cubic root of 117891146 is about 490.3359434414.

The spelling of 117891146 in words is "one hundred seventeen million, eight hundred ninety-one thousand, one hundred forty-six".