118209623 has 8 divisors (see below), whose sum is σ = 138238848. Its totient is φ = 98965944.

The previous prime is 118209563. The next prime is 118209649. The reversal of 118209623 is 326902811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118209623 - 2²⁰ = 117161047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118209623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118209323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196061 + ... + 196662.

It is an arithmetic number, because the mean of its divisors is an integer number (17279856).

Almost surely, 2^118209623 is an apocalyptic number.

118209623 is a deficient number, since it is larger than the sum of its proper divisors (20029225).

118209623 is an equidigital number, since it uses as much as digits as its factorization.

118209623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392773.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 118209623 is about 10872.4248905201. The cubic root of 118209623 is about 490.7770857327. Note that the first 3 decimals are identical.

The spelling of 118209623 in words is "one hundred eighteen million, two hundred nine thousand, six hundred twenty-three".