117864823 has 2 divisors, whose sum is σ = 117864824. Its totient is φ = 117864822.

The previous prime is 117864751. The next prime is 117864827. The reversal of 117864823 is 328468711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117864823 is a prime.

It is equal to p_6726973 and since 117864823 and 6726973 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117864827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58932411 + 58932412.

It is an arithmetic number, because the mean of its divisors is an integer number (58932412).

Almost surely, 2^117864823 is an apocalyptic number.

117864823 is a deficient number, since it is larger than the sum of its proper divisors (1).

117864823 is an equidigital number, since it uses as much as digits as its factorization.

117864823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 117864823 is about 10856.5566824846. The cubic root of 117864823 is about 490.2994462878.

The spelling of 117864823 in words is "one hundred seventeen million, eight hundred sixty-four thousand, eight hundred twenty-three".