89023821 has 4 divisors (see below), whose sum is σ = 118698432. Its totient is φ = 59349212.

The previous prime is 89023819. The next prime is 89023829. The reversal of 89023821 is 12832098.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89023821 - 2¹ = 89023819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89023829) 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, 14837301 + ... + 14837306.

It is an arithmetic number, because the mean of its divisors is an integer number (29674608).

Almost surely, 2^89023821 is an apocalyptic number.

It is an amenable number.

89023821 is a deficient number, since it is larger than the sum of its proper divisors (29674611).

89023821 is a wasteful number, since it uses less digits than its factorization.

89023821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29674610.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 89023821 is about 9435.2435580646. The cubic root of 89023821 is about 446.5143392235.

The spelling of 89023821 in words is "eighty-nine million, twenty-three thousand, eight hundred twenty-one".