90566281 has 8 divisors (see below), whose sum is σ = 98539784. Its totient is φ = 82736640.

The previous prime is 90566261. The next prime is 90566291. The reversal of 90566281 is 18266509.

It can be written as a sum of positive squares in 4 ways, for example, as 4243600 + 86322681 = 2060^2 + 9291^2 .

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 90566281 - 2¹³ = 90558089 is a prime.

It is a super-2 number, since 2×90566281² = 16404502508341922, which contains 22 as substring.

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 90566281.

It is not an unprimeable number, because it can be changed into a prime (90566261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34650 + ... + 37171.

It is an arithmetic number, because the mean of its divisors is an integer number (12317473).

Almost surely, 2^90566281 is an apocalyptic number.

It is an amenable number.

90566281 is a deficient number, since it is larger than the sum of its proper divisors (7973503).

90566281 is a wasteful number, since it uses less digits than its factorization.

90566281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71931.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 90566281 is about 9516.6318096268. The cubic root of 90566281 is about 449.0784118425.

The spelling of 90566281 in words is "ninety million, five hundred sixty-six thousand, two hundred eighty-one".