117239897 has 4 divisors (see below), whose sum is σ = 117410256. Its totient is φ = 117069540.

The previous prime is 117239879. The next prime is 117239909. The reversal of 117239897 is 798932711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117239897 - 2⁶ = 117239833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117239807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84143 + ... + 85524.

It is an arithmetic number, because the mean of its divisors is an integer number (29352564).

Almost surely, 2^117239897 is an apocalyptic number.

It is an amenable number.

117239897 is a deficient number, since it is larger than the sum of its proper divisors (170359).

117239897 is an equidigital number, since it uses as much as digits as its factorization.

117239897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170358.

The product of its digits is 190512, while the sum is 47.

The square root of 117239897 is about 10827.7373906094. The cubic root of 117239897 is about 489.4313784368.

The spelling of 117239897 in words is "one hundred seventeen million, two hundred thirty-nine thousand, eight hundred ninety-seven".