117882981 has 48 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 69949440.

The previous prime is 117882967. The next prime is 117883001. The reversal of 117882981 is 189288711.

It is a happy number.

It is not a de Polignac number, because 117882981 - 2¹⁰ = 117881957 is a prime.

It is a super-2 number, since 2×117882981² = 27792794418892722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117882901) 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 47 ways as a sum of consecutive naturals, for example, 489021 + ... + 489261.

It is an arithmetic number, because the mean of its divisors is an integer number (3963960).

Almost surely, 2^117882981 is an apocalyptic number.

It is an amenable number.

117882981 is a deficient number, since it is larger than the sum of its proper divisors (72387099).

117882981 is a wasteful number, since it uses less digits than its factorization.

117882981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 423 counting only the distinct ones).

The product of its digits is 64512, while the sum is 45.

The square root of 117882981 is about 10857.3929191128. The cubic root of 117882981 is about 490.3246231527.

The spelling of 117882981 in words is "one hundred seventeen million, eight hundred eighty-two thousand, nine hundred eighty-one".