117892989 has 40 divisors (see below), whose sum is σ = 182816480. Its totient is φ = 75652704.

The previous prime is 117892987. The next prime is 117892993. The reversal of 117892989 is 989298711.

It is not a de Polignac number, because 117892989 - 2¹ = 117892987 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 (117892981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 416442 + ... + 416724.

It is an arithmetic number, because the mean of its divisors is an integer number (4570412).

Almost surely, 2^117892989 is an apocalyptic number.

It is an amenable number.

117892989 is a deficient number, since it is larger than the sum of its proper divisors (64923491).

117892989 is a wasteful number, since it uses less digits than its factorization.

117892989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 462 counting only the distinct ones).

The product of its digits is 653184, while the sum is 54.

The square root of 117892989 is about 10857.8537934529. The cubic root of 117892989 is about 490.3384985794.

The spelling of 117892989 in words is "one hundred seventeen million, eight hundred ninety-two thousand, nine hundred eighty-nine".