90054493 has 4 divisors (see below), whose sum is σ = 90135808. Its totient is φ = 89973180.

The previous prime is 90054487. The next prime is 90054527. The reversal of 90054493 is 39445009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90054493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90054443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38973 + ... + 41218.

It is an arithmetic number, because the mean of its divisors is an integer number (22533952).

Almost surely, 2^90054493 is an apocalyptic number.

It is an amenable number.

90054493 is a deficient number, since it is larger than the sum of its proper divisors (81315).

90054493 is a wasteful number, since it uses less digits than its factorization.

90054493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81314.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90054493 is about 9489.7045791742. The cubic root of 90054493 is about 448.2309027737.

The spelling of 90054493 in words is "ninety million, fifty-four thousand, four hundred ninety-three".