84943889 has 4 divisors (see below), whose sum is σ = 89414640. Its totient is φ = 80473140.

The previous prime is 84943879. The next prime is 84943891. The reversal of 84943889 is 98834948.

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 84943889 - 2⁸ = 84943633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84943889.

It is not an unprimeable number, because it can be changed into a prime (84943819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235347 + ... + 2235384.

It is an arithmetic number, because the mean of its divisors is an integer number (22353660).

Almost surely, 2^84943889 is an apocalyptic number.

It is an amenable number.

84943889 is a deficient number, since it is larger than the sum of its proper divisors (4470751).

84943889 is a wasteful number, since it uses less digits than its factorization.

84943889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470750.

The product of its digits is 1990656, while the sum is 53.

The square root of 84943889 is about 9216.5009086963. The cubic root of 84943889 is about 439.5861966995.

The spelling of 84943889 in words is "eighty-four million, nine hundred forty-three thousand, eight hundred eighty-nine".