118438505 has 4 divisors (see below), whose sum is σ = 142126212. Its totient is φ = 94750800.

The previous prime is 118438501. The next prime is 118438519. The reversal of 118438505 is 505834811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82101721 + 36336784 = 9061^2 + 6028^2 .

It is not a de Polignac number, because 118438505 - 2² = 118438501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118438501) 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, 11843846 + ... + 11843855.

It is an arithmetic number, because the mean of its divisors is an integer number (35531553).

Almost surely, 2^118438505 is an apocalyptic number.

It is an amenable number.

118438505 is a deficient number, since it is larger than the sum of its proper divisors (23687707).

118438505 is an equidigital number, since it uses as much as digits as its factorization.

118438505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23687706.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 118438505 is about 10882.9456030985. The cubic root of 118438505 is about 491.0936353128.

The spelling of 118438505 in words is "one hundred eighteen million, four hundred thirty-eight thousand, five hundred five".