117813189 has 8 divisors (see below), whose sum is σ = 169167712. Its totient is φ = 72500400.

The previous prime is 117813187. The next prime is 117813191. The reversal of 117813189 is 981318711.

It is an interprime number because it is at equal distance from previous prime (117813187) and next prime (117813191).

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

It is not a de Polignac number, because 117813189 - 2¹ = 117813187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3020851 = 117813189 / (1 + 1 + 7 + 8 + 1 + 3 + 1 + 8 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117813187) 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, 1510387 + ... + 1510464.

It is an arithmetic number, because the mean of its divisors is an integer number (21145964).

Almost surely, 2^117813189 is an apocalyptic number.

It is an amenable number.

117813189 is a deficient number, since it is larger than the sum of its proper divisors (51354523).

117813189 is a wasteful number, since it uses less digits than its factorization.

117813189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020867.

The product of its digits is 12096, while the sum is 39.

The square root of 117813189 is about 10854.1784120218. The cubic root of 117813189 is about 490.2278393438.

The spelling of 117813189 in words is "one hundred seventeen million, eight hundred thirteen thousand, one hundred eighty-nine".