117942865 has 8 divisors (see below), whose sum is σ = 145356840. Its totient is φ = 91804032.

The previous prime is 117942841. The next prime is 117942893. The reversal of 117942865 is 568249711.

It can be written as a sum of positive squares in 4 ways, for example, as 47651409 + 70291456 = 6903^2 + 8384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117942865 - 2⁵ = 117942833 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 318580 + ... + 318949.

It is an arithmetic number, because the mean of its divisors is an integer number (18169605).

Almost surely, 2^117942865 is an apocalyptic number.

It is an amenable number.

117942865 is a deficient number, since it is larger than the sum of its proper divisors (27413975).

117942865 is an equidigital number, since it uses as much as digits as its factorization.

117942865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637571.

The product of its digits is 120960, while the sum is 43.

The square root of 117942865 is about 10860.1503212433. The cubic root of 117942865 is about 490.4076366318.

It can be divided in two parts, 1179 and 42865, that added together give a palindrome (44044).

The spelling of 117942865 in words is "one hundred seventeen million, nine hundred forty-two thousand, eight hundred sixty-five".