118388321 has 4 divisors (see below), whose sum is σ = 118410672. Its totient is φ = 118365972.

The previous prime is 118388317. The next prime is 118388327. The reversal of 118388321 is 123883811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 118388321 - 2² = 118388317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118388327) 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, 1766 + ... + 15488.

It is an arithmetic number, because the mean of its divisors is an integer number (29602668).

Almost surely, 2^118388321 is an apocalyptic number.

It is an amenable number.

118388321 is a deficient number, since it is larger than the sum of its proper divisors (22351).

118388321 is an equidigital number, since it uses as much as digits as its factorization.

118388321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22350.

The product of its digits is 9216, while the sum is 35.

The square root of 118388321 is about 10880.6397330304. The cubic root of 118388321 is about 491.0242645041.

The spelling of 118388321 in words is "one hundred eighteen million, three hundred eighty-eight thousand, three hundred twenty-one".