84334821 has 4 divisors (see below), whose sum is σ = 112446432. Its totient is φ = 56223212.

The previous prime is 84334793. The next prime is 84334823. The reversal of 84334821 is 12843348.

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 84334821 - 2¹⁰ = 84333797 is a prime.

It is a super-2 number, since 2×84334821² = 14224724066204082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84334823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14055801 + ... + 14055806.

It is an arithmetic number, because the mean of its divisors is an integer number (28111608).

Almost surely, 2^84334821 is an apocalyptic number.

It is an amenable number.

84334821 is a deficient number, since it is larger than the sum of its proper divisors (28111611).

84334821 is a wasteful number, since it uses less digits than its factorization.

84334821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28111610.

The product of its digits is 18432, while the sum is 33.

The square root of 84334821 is about 9183.3992072652. The cubic root of 84334821 is about 438.5330294655.

The spelling of 84334821 in words is "eighty-four million, three hundred thirty-four thousand, eight hundred twenty-one".