118838409 has 4 divisors (see below), whose sum is σ = 158451216. Its totient is φ = 79225604.

The previous prime is 118838341. The next prime is 118838411. The reversal of 118838409 is 904838811.

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 118838409 - 2⁷ = 118838281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118838429) 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, 19806399 + ... + 19806404.

It is an arithmetic number, because the mean of its divisors is an integer number (39612804).

Almost surely, 2^118838409 is an apocalyptic number.

It is an amenable number.

118838409 is a deficient number, since it is larger than the sum of its proper divisors (39612807).

118838409 is an equidigital number, since it uses as much as digits as its factorization.

118838409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39612806.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 118838409 is about 10901.3030872460. The cubic root of 118838409 is about 491.6457352895.

The spelling of 118838409 in words is "one hundred eighteen million, eight hundred thirty-eight thousand, four hundred nine".