117810643 has 4 divisors (see below), whose sum is σ = 117907120. Its totient is φ = 117714168.

The previous prime is 117810619. The next prime is 117810647. The reversal of 117810643 is 346018711.

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 117810643 - 2²¹ = 115713491 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (117810647) 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, 46383 + ... + 48856.

It is an arithmetic number, because the mean of its divisors is an integer number (29476780).

Almost surely, 2^117810643 is an apocalyptic number.

117810643 is a deficient number, since it is larger than the sum of its proper divisors (96477).

117810643 is an equidigital number, since it uses as much as digits as its factorization.

117810643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96476.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 117810643 is about 10854.0611293654. The cubic root of 117810643 is about 490.2243079648.

The spelling of 117810643 in words is "one hundred seventeen million, eight hundred ten thousand, six hundred forty-three".