84538879 has 4 divisors (see below), whose sum is σ = 84558600. Its totient is φ = 84519160.

The previous prime is 84538859. The next prime is 84538889. The reversal of 84538879 is 97883548.

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 84538879 - 2⁹ = 84538367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84538849) 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, 412 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (21139650).

Almost surely, 2^84538879 is an apocalyptic number.

84538879 is a deficient number, since it is larger than the sum of its proper divisors (19721).

84538879 is a wasteful number, since it uses less digits than its factorization.

84538879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19720.

The product of its digits is 1935360, while the sum is 52.

The square root of 84538879 is about 9194.5026510410. The cubic root of 84538879 is about 438.8864386292.

The spelling of 84538879 in words is "eighty-four million, five hundred thirty-eight thousand, eight hundred seventy-nine".