118538881 has 2 divisors, whose sum is σ = 118538882. Its totient is φ = 118538880.

The previous prime is 118538837. The next prime is 118538951. The reversal of 118538881 is 188835811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 49914225 = 8284^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 118538881 - 2²¹ = 116441729 is a prime.

It is a super-2 number, since 2×118538881² = 28102932617464322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118538801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59269440 + 59269441.

It is an arithmetic number, because the mean of its divisors is an integer number (59269441).

Almost surely, 2^118538881 is an apocalyptic number.

It is an amenable number.

118538881 is a deficient number, since it is larger than the sum of its proper divisors (1).

118538881 is an equidigital number, since it uses as much as digits as its factorization.

118538881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 43.

The square root of 118538881 is about 10887.5562455493. The cubic root of 118538881 is about 491.2323292165.

The spelling of 118538881 in words is "one hundred eighteen million, five hundred thirty-eight thousand, eight hundred eighty-one".