89240561 has 4 divisors (see below), whose sum is σ = 89287332. Its totient is φ = 89193792.

The previous prime is 89240513. The next prime is 89240563. The reversal of 89240561 is 16504298.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16504298 = 2 ⋅8252149.

It can be written as a sum of positive squares in 2 ways, for example, as 78872161 + 10368400 = 8881^2 + 3220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89240561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89240563) 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, 20396 + ... + 24381.

It is an arithmetic number, because the mean of its divisors is an integer number (22321833).

Almost surely, 2^89240561 is an apocalyptic number.

It is an amenable number.

89240561 is a deficient number, since it is larger than the sum of its proper divisors (46771).

89240561 is a wasteful number, since it uses less digits than its factorization.

89240561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46770.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 89240561 is about 9446.7222357810. The cubic root of 89240561 is about 446.8764111713.

The spelling of 89240561 in words is "eighty-nine million, two hundred forty thousand, five hundred sixty-one".