117786887 has 18 divisors (see below), whose sum is σ = 128764296. Its totient is φ = 107537760.

The previous prime is 117786857. The next prime is 117786899. The reversal of 117786887 is 788687711.

It is not a de Polignac number, because 117786887 - 2⁸ = 117786631 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 (117786827) 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 17 ways as a sum of consecutive naturals, for example, 1613483 + ... + 1613555.

It is an arithmetic number, because the mean of its divisors is an integer number (7153572).

Almost surely, 2^117786887 is an apocalyptic number.

117786887 is a deficient number, since it is larger than the sum of its proper divisors (10977409).

117786887 is an frugal number, since it uses more digits than its factorization.

117786887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 127 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 53.

The square root of 117786887 is about 10852.9667372567. The cubic root of 117786887 is about 490.1913552218.

The spelling of 117786887 in words is "one hundred seventeen million, seven hundred eighty-six thousand, eight hundred eighty-seven".