84671879 has 4 divisors (see below), whose sum is σ = 84715176. Its totient is φ = 84628584.

The previous prime is 84671861. The next prime is 84671887. The reversal of 84671879 is 97817648.

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 84671879 - 2⁸ = 84671623 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 (84671779) 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, 18569 + ... + 22674.

It is an arithmetic number, because the mean of its divisors is an integer number (21178794).

Almost surely, 2^84671879 is an apocalyptic number.

84671879 is a deficient number, since it is larger than the sum of its proper divisors (43297).

84671879 is a wasteful number, since it uses less digits than its factorization.

84671879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43296.

The product of its digits is 677376, while the sum is 50.

The square root of 84671879 is about 9201.7323912402. The cubic root of 84671879 is about 439.1164760303.

The spelling of 84671879 in words is "eighty-four million, six hundred seventy-one thousand, eight hundred seventy-nine".