84483816921 has 27 divisors (see below), whose sum is σ = 141966058143. Its totient is φ = 48272978880.

The previous prime is 84483816919. The next prime is 84483816973. The reversal of 84483816921 is 12961838448.

It is a happy number.

The square root of 84483816921 is 290661.

It is a perfect power (a square), and thus also a powerful number.

84483816921 is a `hidden beast` number, since 8 + 4 + 483 + 81 + 69 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26768559321 + 57715257600 = 163611^2 + 240240^2 .

It is not a de Polignac number, because 84483816921 - 2¹ = 84483816919 is a prime.

It is a super-3 number, since 3×84483816921³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84483811921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6096961 + ... + 6110801.

Almost surely, 2^84483816921 is an apocalyptic number.

84483816921 is the 290661-st square number.

84483816921 is the 145331-st centered octagonal number.

It is an amenable number.

84483816921 is a deficient number, since it is larger than the sum of its proper divisors (57482241222).

84483816921 is an frugal number, since it uses more digits than its factorization.

84483816921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27702 (or 13851 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 84483816921 in words is "eighty-four billion, four hundred eighty-three million, eight hundred sixteen thousand, nine hundred twenty-one".