117697988 has 6 divisors (see below), whose sum is σ = 205971486. Its totient is φ = 58848992.

The previous prime is 117697981. The next prime is 117698017. The reversal of 117697988 is 889796711.

It can be written as a sum of positive squares in only one way, i.e., 113379904 + 4318084 = 10648^2 + 2078^2 .

It is not an unprimeable number, because it can be changed into a prime (117697981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14712245 + ... + 14712252.

It is an arithmetic number, because the mean of its divisors is an integer number (34328581).

Almost surely, 2^117697988 is an apocalyptic number.

It is an amenable number.

117697988 is a deficient number, since it is larger than the sum of its proper divisors (88273498).

117697988 is a wasteful number, since it uses less digits than its factorization.

117697988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29424501 (or 29424499 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 56.

The square root of 117697988 is about 10848.8703559403. The cubic root of 117697988 is about 490.0680011137.

The spelling of 117697988 in words is "one hundred seventeen million, six hundred ninety-seven thousand, nine hundred eighty-eight".