118637389 has 4 divisors (see below), whose sum is σ = 127763356. Its totient is φ = 109511424.

The previous prime is 118637333. The next prime is 118637401. The reversal of 118637389 is 983736811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66292164 + 52345225 = 8142^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 118637389 - 2⁷ = 118637261 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 (118637489) 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, 4562964 + ... + 4562989.

It is an arithmetic number, because the mean of its divisors is an integer number (31940839).

Almost surely, 2^118637389 is an apocalyptic number.

It is an amenable number.

118637389 is a deficient number, since it is larger than the sum of its proper divisors (9125967).

118637389 is an equidigital number, since it uses as much as digits as its factorization.

118637389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125966.

The product of its digits is 217728, while the sum is 46.

The square root of 118637389 is about 10892.0791862711. The cubic root of 118637389 is about 491.3683659207.

The spelling of 118637389 in words is "one hundred eighteen million, six hundred thirty-seven thousand, three hundred eighty-nine".