118638141 has 4 divisors (see below), whose sum is σ = 158184192. Its totient is φ = 79092092.

The previous prime is 118638137. The next prime is 118638151. The reversal of 118638141 is 141836811.

It is a happy number.

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 118638141 - 2² = 118638137 is a prime.

It is a super-4 number, since 4×118638141⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118638131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19773021 + ... + 19773026.

It is an arithmetic number, because the mean of its divisors is an integer number (39546048).

Almost surely, 2^118638141 is an apocalyptic number.

It is an amenable number.

118638141 is a deficient number, since it is larger than the sum of its proper divisors (39546051).

118638141 is an equidigital number, since it uses as much as digits as its factorization.

118638141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39546050.

The product of its digits is 4608, while the sum is 33.

The square root of 118638141 is about 10892.1137067146. The cubic root of 118638141 is about 491.3694041213.

The spelling of 118638141 in words is "one hundred eighteen million, six hundred thirty-eight thousand, one hundred forty-one".