117724891 has 8 divisors (see below), whose sum is σ = 122245200. Its totient is φ = 113235360.

The previous prime is 117724889. The next prime is 117724897. The reversal of 117724891 is 198427711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117724891 - 2¹ = 117724889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117724897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (15280650).

Almost surely, 2^117724891 is an apocalyptic number.

117724891 is a deficient number, since it is larger than the sum of its proper divisors (4520309).

117724891 is a wasteful number, since it uses less digits than its factorization.

117724891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15389.

The product of its digits is 28224, while the sum is 40.

The square root of 117724891 is about 10850.1101837723. The cubic root of 117724891 is about 490.1053376200.

The spelling of 117724891 in words is "one hundred seventeen million, seven hundred twenty-four thousand, eight hundred ninety-one".