90055118 has 4 divisors (see below), whose sum is σ = 135082680. Its totient is φ = 45027558.

The previous prime is 90055111. The next prime is 90055139. The reversal of 90055118 is 81155009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81155009 = 13 ⋅6242693.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90055111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22513778 + ... + 22513781.

It is an arithmetic number, because the mean of its divisors is an integer number (33770670).

Almost surely, 2^90055118 is an apocalyptic number.

90055118 is a deficient number, since it is larger than the sum of its proper divisors (45027562).

90055118 is a wasteful number, since it uses less digits than its factorization.

90055118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45027561.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 90055118 is about 9489.7375095416. The cubic root of 90055118 is about 448.2319397150.

The spelling of 90055118 in words is "ninety million, fifty-five thousand, one hundred eighteen".