84472839 has 24 divisors (see below), whose sum is σ = 133416192. Its totient is φ = 51077520.

The previous prime is 84472807. The next prime is 84472849. The reversal of 84472839 is 93827448.

It is not a de Polignac number, because 84472839 - 2⁵ = 84472807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84472794 and 84472803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84472849) 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 23 ways as a sum of consecutive naturals, for example, 62994 + ... + 64320.

It is an arithmetic number, because the mean of its divisors is an integer number (5559008).

Almost surely, 2^84472839 is an apocalyptic number.

84472839 is a deficient number, since it is larger than the sum of its proper divisors (48943353).

84472839 is a wasteful number, since it uses less digits than its factorization.

84472839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1984 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 84472839 is about 9190.9106730508. The cubic root of 84472839 is about 438.7721258961.

The spelling of 84472839 in words is "eighty-four million, four hundred seventy-two thousand, eight hundred thirty-nine".