90539945 has 8 divisors (see below), whose sum is σ = 108996936. Its totient is φ = 72199296.

The previous prime is 90539923. The next prime is 90539957. The reversal of 90539945 is 54993509.

It can be written as a sum of positive squares in 4 ways, for example, as 5513104 + 85026841 = 2348^2 + 9221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90539945 - 2⁶ = 90539881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90539896 and 90539905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27362 + ... + 30491.

It is an arithmetic number, because the mean of its divisors is an integer number (13624617).

Almost surely, 2^90539945 is an apocalyptic number.

It is an amenable number.

90539945 is a deficient number, since it is larger than the sum of its proper divisors (18456991).

90539945 is a wasteful number, since it uses less digits than its factorization.

90539945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58171.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 90539945 is about 9515.2480261946. The cubic root of 90539945 is about 449.0348780700.

The spelling of 90539945 in words is "ninety million, five hundred thirty-nine thousand, nine hundred forty-five".