89019821 has 24 divisors (see below), whose sum is σ = 105719040. Its totient is φ = 74671520.

The previous prime is 89019793. The next prime is 89019829. The reversal of 89019821 is 12891098.

It is not a de Polignac number, because 89019821 - 2⁶ = 89019757 is a prime.

It is a super-3 number, since 3×89019821³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89019829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80156 + ... + 81258.

It is an arithmetic number, because the mean of its divisors is an integer number (4404960).

Almost surely, 2^89019821 is an apocalyptic number.

It is an amenable number.

89019821 is a deficient number, since it is larger than the sum of its proper divisors (16699219).

89019821 is a wasteful number, since it uses less digits than its factorization.

89019821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 89019821 is about 9435.0315844728. The cubic root of 89019821 is about 446.5076515599.

The spelling of 89019821 in words is "eighty-nine million, nineteen thousand, eight hundred twenty-one".