84429643 has 4 divisors (see below), whose sum is σ = 87341040. Its totient is φ = 81518248.

The previous prime is 84429641. The next prime is 84429659. The reversal of 84429643 is 34692448.

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 84429643 - 2¹ = 84429641 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 84429596 and 84429605.

It is not an unprimeable number, because it can be changed into a prime (84429641) 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 3 ways as a sum of consecutive naturals, for example, 1455655 + ... + 1455712.

It is an arithmetic number, because the mean of its divisors is an integer number (21835260).

Almost surely, 2^84429643 is an apocalyptic number.

84429643 is a deficient number, since it is larger than the sum of its proper divisors (2911397).

84429643 is a wasteful number, since it uses less digits than its factorization.

84429643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911396.

The product of its digits is 165888, while the sum is 40.

The square root of 84429643 is about 9188.5604422020. The cubic root of 84429643 is about 438.6973230265.

The spelling of 84429643 in words is "eighty-four million, four hundred twenty-nine thousand, six hundred forty-three".