117342981 has 12 divisors (see below), whose sum is σ = 193709152. Its totient is φ = 67053096.

The previous prime is 117342977. The next prime is 117342997. The reversal of 117342981 is 189243711.

It is a happy number.

It is not a de Polignac number, because 117342981 - 2² = 117342977 is a prime.

It is a super-2 number, since 2×117342981² = 27538750379932722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117342931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 931231 + ... + 931356.

Almost surely, 2^117342981 is an apocalyptic number.

It is an amenable number.

117342981 is a deficient number, since it is larger than the sum of its proper divisors (76366171).

117342981 is a wasteful number, since it uses less digits than its factorization.

117342981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862600 (or 1862597 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 117342981 is about 10832.4965266553. The cubic root of 117342981 is about 489.5747817373.

The spelling of 117342981 in words is "one hundred seventeen million, three hundred forty-two thousand, nine hundred eighty-one".