118647823 has 18 divisors (see below), whose sum is σ = 142545704. Its totient is φ = 96733032.

The previous prime is 118647779. The next prime is 118647833. The reversal of 118647823 is 328746811.

It is a de Polignac number, because none of the positive numbers 2^k-118647823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118647833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 662748 + ... + 662926.

Almost surely, 2^118647823 is an apocalyptic number.

118647823 is a deficient number, since it is larger than the sum of its proper divisors (23897881).

118647823 is an frugal number, since it uses more digits than its factorization.

118647823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 209 counting only the distinct ones).

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

The square root of 118647823 is about 10892.5581476529. The cubic root of 118647823 is about 491.3827705623.

Multiplying 118647823 by its product of digits (64512), we get a square (7654208357376 = 2766624²).

The spelling of 118647823 in words is "one hundred eighteen million, six hundred forty-seven thousand, eight hundred twenty-three".