89202821 has 4 divisors (see below), whose sum is σ = 89534700. Its totient is φ = 88870944.

The previous prime is 89202803. The next prime is 89202829. The reversal of 89202821 is 12820298.

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 28206721 + 60996100 = 5311^2 + 7810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89202821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89202829) 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, 165536 + ... + 166073.

It is an arithmetic number, because the mean of its divisors is an integer number (22383675).

Almost surely, 2^89202821 is an apocalyptic number.

It is an amenable number.

89202821 is a deficient number, since it is larger than the sum of its proper divisors (331879).

89202821 is a wasteful number, since it uses less digits than its factorization.

89202821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331878.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 89202821 is about 9444.7245063051. The cubic root of 89202821 is about 446.8134073326.

The spelling of 89202821 in words is "eighty-nine million, two hundred two thousand, eight hundred twenty-one".