117703891 has 4 divisors (see below), whose sum is σ = 118494000. Its totient is φ = 116913784.

The previous prime is 117703853. The next prime is 117703913. The reversal of 117703891 is 198307711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117703891 - 2⁷ = 117703763 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 117703891.

It is not an unprimeable number, because it can be changed into a prime (117703591) 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, 394831 + ... + 395128.

It is an arithmetic number, because the mean of its divisors is an integer number (29623500).

Almost surely, 2^117703891 is an apocalyptic number.

117703891 is a deficient number, since it is larger than the sum of its proper divisors (790109).

117703891 is an equidigital number, since it uses as much as digits as its factorization.

117703891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790108.

The product of its (nonzero) digits is 10584, while the sum is 37.

The square root of 117703891 is about 10849.1424085040. The cubic root of 117703891 is about 490.0761938990.

The spelling of 117703891 in words is "one hundred seventeen million, seven hundred three thousand, eight hundred ninety-one".