117801823 has 4 divisors (see below), whose sum is σ = 124731360. Its totient is φ = 110872288.

The previous prime is 117801781. The next prime is 117801833. The reversal of 117801823 is 328108711.

It is a happy number.

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 117801823 - 2²⁵ = 84247391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117801833) 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, 3464743 + ... + 3464776.

It is an arithmetic number, because the mean of its divisors is an integer number (31182840).

Almost surely, 2^117801823 is an apocalyptic number.

117801823 is a deficient number, since it is larger than the sum of its proper divisors (6929537).

117801823 is an equidigital number, since it uses as much as digits as its factorization.

117801823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929536.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 117801823 is about 10853.6548222246. The cubic root of 117801823 is about 490.2120739646.

The spelling of 117801823 in words is "one hundred seventeen million, eight hundred one thousand, eight hundred twenty-three".