117645243 has 4 divisors (see below), whose sum is σ = 156860328. Its totient is φ = 78430160.

The previous prime is 117645223. The next prime is 117645251. The reversal of 117645243 is 342546711.

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 117645243 - 2¹⁷ = 117514171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117645223) 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, 19607538 + ... + 19607543.

It is an arithmetic number, because the mean of its divisors is an integer number (39215082).

Almost surely, 2^117645243 is an apocalyptic number.

117645243 is a deficient number, since it is larger than the sum of its proper divisors (39215085).

117645243 is an equidigital number, since it uses as much as digits as its factorization.

117645243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39215084.

The product of its digits is 20160, while the sum is 33.

The square root of 117645243 is about 10846.4391852810. The cubic root of 117645243 is about 489.9947840622.

The spelling of 117645243 in words is "one hundred seventeen million, six hundred forty-five thousand, two hundred forty-three".