84323819 has 4 divisors (see below), whose sum is σ = 87990096. Its totient is φ = 80657544.

The previous prime is 84323801. The next prime is 84323821. The reversal of 84323819 is 91832348.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84323819 - 2¹² = 84319723 is a prime.

It is a super-2 number, since 2×84323819² = 14221012901489522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84323119) 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, 1833104 + ... + 1833149.

It is an arithmetic number, because the mean of its divisors is an integer number (21997524).

Almost surely, 2^84323819 is an apocalyptic number.

84323819 is a deficient number, since it is larger than the sum of its proper divisors (3666277).

84323819 is a wasteful number, since it uses less digits than its factorization.

84323819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666276.

The product of its digits is 41472, while the sum is 38.

The square root of 84323819 is about 9182.8001720608. The cubic root of 84323819 is about 438.5139588525.

The spelling of 84323819 in words is "eighty-four million, three hundred twenty-three thousand, eight hundred nineteen".