90054418 has 4 divisors (see below), whose sum is σ = 135081630. Its totient is φ = 45027208.

The previous prime is 90054401. The next prime is 90054431. The reversal of 90054418 is 81445009.

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: 81445009 = 1453 ⋅56053.

It can be written as a sum of positive squares in only one way, i.e., 62837329 + 27217089 = 7927^2 + 5217^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 90054418.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22513603 + ... + 22513606.

Almost surely, 2^90054418 is an apocalyptic number.

90054418 is a deficient number, since it is larger than the sum of its proper divisors (45027212).

90054418 is a wasteful number, since it uses less digits than its factorization.

90054418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45027211.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 90054418 is about 9489.7006275225. The cubic root of 90054418 is about 448.2307783404.

The spelling of 90054418 in words is "ninety million, fifty-four thousand, four hundred eighteen".