90541985 has 8 divisors (see below), whose sum is σ = 108862056. Its totient is φ = 72292480.

The previous prime is 90541951. The next prime is 90541993. The reversal of 90541985 is 58914509.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 519841 + 90022144 = 721^2 + 9488^2 .

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

It is not a de Polignac number, because 90541985 - 2⁶ = 90541921 is a prime.

It is a Duffinian number.

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, 14774 + ... + 19983.

It is an arithmetic number, because the mean of its divisors is an integer number (13607757).

Almost surely, 2^90541985 is an apocalyptic number.

It is an amenable number.

90541985 is a deficient number, since it is larger than the sum of its proper divisors (18320071).

90541985 is a wasteful number, since it uses less digits than its factorization.

90541985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35283.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 90541985 is about 9515.3552219557. The cubic root of 90541985 is about 449.0382505198.

The spelling of 90541985 in words is "ninety million, five hundred forty-one thousand, nine hundred eighty-five".