90268609 has 4 divisors (see below), whose sum is σ = 90736516. Its totient is φ = 89800704.

The previous prime is 90268597. The next prime is 90268613. The reversal of 90268609 is 90686209.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51480625 + 38787984 = 7175^2 + 6228^2 .

It is a cyclic number.

It is not a de Polignac number, because 90268609 - 2¹⁵ = 90235841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90268109) 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, 233664 + ... + 234049.

It is an arithmetic number, because the mean of its divisors is an integer number (22684129).

Almost surely, 2^90268609 is an apocalyptic number.

It is an amenable number.

90268609 is a deficient number, since it is larger than the sum of its proper divisors (467907).

90268609 is a wasteful number, since it uses less digits than its factorization.

90268609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467906.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 90268609 is about 9500.9793705702. The cubic root of 90268609 is about 448.5858635761.

The spelling of 90268609 in words is "ninety million, two hundred sixty-eight thousand, six hundred nine".