84530879 has 4 divisors (see below), whose sum is σ = 84612360. Its totient is φ = 84449400.

The previous prime is 84530837. The next prime is 84530881. The reversal of 84530879 is 97803548.

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 84530879 - 2²⁰ = 83482303 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 (84530179) 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, 39164 + ... + 41265.

It is an arithmetic number, because the mean of its divisors is an integer number (21153090).

Almost surely, 2^84530879 is an apocalyptic number.

84530879 is a deficient number, since it is larger than the sum of its proper divisors (81481).

84530879 is a wasteful number, since it uses less digits than its factorization.

84530879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81480.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 84530879 is about 9194.0675981853. The cubic root of 84530879 is about 438.8725941027.

The spelling of 84530879 in words is "eighty-four million, five hundred thirty thousand, eight hundred seventy-nine".