117899138 has 16 divisors (see below), whose sum is σ = 208633344. Its totient is φ = 48898080.

The previous prime is 117899137. The next prime is 117899141. The reversal of 117899138 is 831998711.

It is a super-2 number, since 2×117899138² = 27800413482286088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 117899092 and 117899101.

It is not an unprimeable number, because it can be changed into a prime (117899137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135395 + ... + 136262.

It is an arithmetic number, because the mean of its divisors is an integer number (13039584).

Almost surely, 2^117899138 is an apocalyptic number.

117899138 is a deficient number, since it is larger than the sum of its proper divisors (90734206).

117899138 is a wasteful number, since it uses less digits than its factorization.

117899138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271697.

The product of its digits is 108864, while the sum is 47.

The square root of 117899138 is about 10858.1369488508. The cubic root of 117899138 is about 490.3470233696.

The spelling of 117899138 in words is "one hundred seventeen million, eight hundred ninety-nine thousand, one hundred thirty-eight".