118638401 has 4 divisors (see below), whose sum is σ = 135586752. Its totient is φ = 101690052.

The previous prime is 118638397. The next prime is 118638407. The reversal of 118638401 is 104836811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104836811 = 131 ⋅800281.

It is a cyclic number.

It is not a de Polignac number, because 118638401 - 2² = 118638397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118638407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8474165 + ... + 8474178.

It is an arithmetic number, because the mean of its divisors is an integer number (33896688).

Almost surely, 2^118638401 is an apocalyptic number.

It is an amenable number.

118638401 is a deficient number, since it is larger than the sum of its proper divisors (16948351).

118638401 is an equidigital number, since it uses as much as digits as its factorization.

118638401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948350.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 118638401 is about 10892.1256419489. The cubic root of 118638401 is about 491.3697630726.

The spelling of 118638401 in words is "one hundred eighteen million, six hundred thirty-eight thousand, four hundred one".