84573821 has 8 divisors (see below), whose sum is σ = 86502144. Its totient is φ = 82650960.

The previous prime is 84573809. The next prime is 84573847. The reversal of 84573821 is 12837548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84573821 - 2⁶ = 84573757 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 (84573871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60551 + ... + 61931.

It is an arithmetic number, because the mean of its divisors is an integer number (10812768).

Almost surely, 2^84573821 is an apocalyptic number.

It is an amenable number.

84573821 is a deficient number, since it is larger than the sum of its proper divisors (1928323).

84573821 is a wasteful number, since it uses less digits than its factorization.

84573821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its digits is 53760, while the sum is 38.

The square root of 84573821 is about 9196.4026118912. The cubic root of 84573821 is about 438.9468978237.

The spelling of 84573821 in words is "eighty-four million, five hundred seventy-three thousand, eight hundred twenty-one".