118594381 has 4 divisors (see below), whose sum is σ = 118621692. Its totient is φ = 118567072.

The previous prime is 118594379. The next prime is 118594403. The reversal of 118594381 is 183495811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183495811 = 919 ⋅199669.

It can be written as a sum of positive squares in 2 ways, for example, as 45765225 + 72829156 = 6765^2 + 8534^2 .

It is a cyclic number.

It is not a de Polignac number, because 118594381 - 2¹ = 118594379 is a prime.

It is a super-2 number, since 2×118594381² = 28129254409546322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118594331) 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, 5530 + ... + 16363.

It is an arithmetic number, because the mean of its divisors is an integer number (29655423).

Almost surely, 2^118594381 is an apocalyptic number.

It is an amenable number.

118594381 is a deficient number, since it is larger than the sum of its proper divisors (27311).

118594381 is an equidigital number, since it uses as much as digits as its factorization.

118594381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310.

The product of its digits is 34560, while the sum is 40.

The square root of 118594381 is about 10890.1047286057. The cubic root of 118594381 is about 491.3089823794.

The spelling of 118594381 in words is "one hundred eighteen million, five hundred ninety-four thousand, three hundred eighty-one".