117791841 has 4 divisors (see below), whose sum is σ = 157055792. Its totient is φ = 78527892.

The previous prime is 117791837. The next prime is 117791873. The reversal of 117791841 is 148197711.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 148197711 = 3 ⋅49399237.

It is not a de Polignac number, because 117791841 - 2² = 117791837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117791841.

It is not an unprimeable number, because it can be changed into a prime (117791341) 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, 19631971 + ... + 19631976.

It is an arithmetic number, because the mean of its divisors is an integer number (39263948).

Almost surely, 2^117791841 is an apocalyptic number.

It is an amenable number.

117791841 is a deficient number, since it is larger than the sum of its proper divisors (39263951).

117791841 is an equidigital number, since it uses as much as digits as its factorization.

117791841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39263950.

The product of its digits is 14112, while the sum is 39.

The square root of 117791841 is about 10853.1949673817. The cubic root of 117791841 is about 490.1982274467.

The spelling of 117791841 in words is "one hundred seventeen million, seven hundred ninety-one thousand, eight hundred forty-one".