90054565 has 4 divisors (see below), whose sum is σ = 108065484. Its totient is φ = 72043648.

The previous prime is 90054563. The next prime is 90054607. The reversal of 90054565 is 56545009.

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: 56545009 = 17 ⋅3326177.

It can be written as a sum of positive squares in 2 ways, for example, as 13439556 + 76615009 = 3666^2 + 8753^2 .

It is a cyclic number.

It is not a de Polignac number, because 90054565 - 2¹ = 90054563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90054565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90054563) 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, 9005452 + ... + 9005461.

It is an arithmetic number, because the mean of its divisors is an integer number (27016371).

Almost surely, 2^90054565 is an apocalyptic number.

It is an amenable number.

90054565 is a deficient number, since it is larger than the sum of its proper divisors (18010919).

90054565 is a wasteful number, since it uses less digits than its factorization.

90054565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18010918.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 90054565 is about 9489.7083727584. The cubic root of 90054565 is about 448.2310222296.

The spelling of 90054565 in words is "ninety million, fifty-four thousand, five hundred sixty-five".