89821801 has 4 divisors (see below), whose sum is σ = 89868100. Its totient is φ = 89775504.

The previous prime is 89821799. The next prime is 89821807. The reversal of 89821801 is 10812898.

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 88811776 + 1010025 = 9424^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 89821801 - 2¹ = 89821799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89821807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20106 + ... + 24163.

It is an arithmetic number, because the mean of its divisors is an integer number (22467025).

Almost surely, 2^89821801 is an apocalyptic number.

It is an amenable number.

89821801 is a deficient number, since it is larger than the sum of its proper divisors (46299).

89821801 is a wasteful number, since it uses less digits than its factorization.

89821801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46298.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 89821801 is about 9477.4364149806. The cubic root of 89821801 is about 447.8445081794.

The spelling of 89821801 in words is "eighty-nine million, eight hundred twenty-one thousand, eight hundred one".