84444921 has 24 divisors (see below), whose sum is σ = 133906656. Its totient is φ = 50855040.

The previous prime is 84444889. The next prime is 84444929. The reversal of 84444921 is 12944448.

It is not a de Polignac number, because 84444921 - 2⁵ = 84444889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84444929) 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, 13521 + ... + 18753.

It is an arithmetic number, because the mean of its divisors is an integer number (5579444).

Almost surely, 2^84444921 is an apocalyptic number.

It is an amenable number.

84444921 is a deficient number, since it is larger than the sum of its proper divisors (49461735).

84444921 is a wasteful number, since it uses less digits than its factorization.

84444921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5410 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 84444921 is about 9189.3917644205. The cubic root of 84444921 is about 438.7237829807.

The spelling of 84444921 in words is "eighty-four million, four hundred forty-four thousand, nine hundred twenty-one".