90534545 has 4 divisors (see below), whose sum is σ = 108641460. Its totient is φ = 72427632.

The previous prime is 90534529. The next prime is 90534559. The reversal of 90534545 is 54543509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54543509 = 19 ⋅2870711.

It can be written as a sum of positive squares in 2 ways, for example, as 39740416 + 50794129 = 6304^2 + 7127^2 .

It is a cyclic number.

It is not a de Polignac number, because 90534545 - 2⁴ = 90534529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9053450 + ... + 9053459.

It is an arithmetic number, because the mean of its divisors is an integer number (27160365).

Almost surely, 2^90534545 is an apocalyptic number.

It is an amenable number.

90534545 is a deficient number, since it is larger than the sum of its proper divisors (18106915).

90534545 is a wasteful number, since it uses less digits than its factorization.

90534545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18106914.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 90534545 is about 9514.9642668798. The cubic root of 90534545 is about 449.0259507523.

The spelling of 90534545 in words is "ninety million, five hundred thirty-four thousand, five hundred forty-five".