118660399 has 16 divisors (see below), whose sum is σ = 139948704. Its totient is φ = 99187200.

The previous prime is 118660379. The next prime is 118660403. The reversal of 118660399 is 993066811.

It is a cyclic number.

It is not a de Polignac number, because 118660399 - 2⁹ = 118659887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118660319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38707 + ... + 41659.

It is an arithmetic number, because the mean of its divisors is an integer number (8746794).

Almost surely, 2^118660399 is an apocalyptic number.

118660399 is a deficient number, since it is larger than the sum of its proper divisors (21288305).

118660399 is a wasteful number, since it uses less digits than its factorization.

118660399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 118660399 is about 10893.1354072186. The cubic root of 118660399 is about 491.4001312163.

The spelling of 118660399 in words is "one hundred eighteen million, six hundred sixty thousand, three hundred ninety-nine".