118399999 has 4 divisors (see below), whose sum is σ = 118422136. Its totient is φ = 118377864.

The previous prime is 118399997. The next prime is 118400057. The reversal of 118399999 is 999993811.

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 118399999 - 2¹ = 118399997 is a prime.

It is a Duffinian number.

118399999 is a modest number, since divided by 99999 gives 1183 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118399991) 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, 2497 + ... + 15589.

It is an arithmetic number, because the mean of its divisors is an integer number (29605534).

Almost surely, 2^118399999 is an apocalyptic number.

118399999 is a deficient number, since it is larger than the sum of its proper divisors (22137).

118399999 is an equidigital number, since it uses as much as digits as its factorization.

118399999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22136.

The product of its digits is 1417176, while the sum is 58.

The square root of 118399999 is about 10881.1763610374. The cubic root of 118399999 is about 491.0404090944.

The spelling of 118399999 in words is "one hundred eighteen million, three hundred ninety-nine thousand, nine hundred ninety-nine".