84213999 has 20 divisors (see below), whose sum is σ = 130142760. Its totient is φ = 54205200.

The previous prime is 84213973. The next prime is 84214003. The reversal of 84213999 is 99931248.

It is not a de Polignac number, because 84213999 - 2⁹ = 84213487 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84213929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15577 + ... + 20274.

It is an arithmetic number, because the mean of its divisors is an integer number (6507138).

Almost surely, 2^84213999 is an apocalyptic number.

84213999 is a deficient number, since it is larger than the sum of its proper divisors (45928761).

84213999 is a wasteful number, since it uses less digits than its factorization.

84213999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35892 (or 35883 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 84213999 is about 9176.8185663660. The cubic root of 84213999 is about 438.3235084164.

It can be divided in two parts, 842 and 13999, that added together give a palindrome (14841).

The spelling of 84213999 in words is "eighty-four million, two hundred thirteen thousand, nine hundred ninety-nine".