84500979 has 4 divisors (see below), whose sum is σ = 112667976. Its totient is φ = 56333984.

The previous prime is 84500963. The next prime is 84500981. The reversal of 84500979 is 97900548.

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 84500979 - 2⁴ = 84500963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84500979.

It is not an unprimeable number, because it can be changed into a prime (84500989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14083494 + ... + 14083499.

It is an arithmetic number, because the mean of its divisors is an integer number (28166994).

Almost surely, 2^84500979 is an apocalyptic number.

84500979 is a deficient number, since it is larger than the sum of its proper divisors (28166997).

84500979 is a wasteful number, since it uses less digits than its factorization.

84500979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28166996.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 84500979 is about 9192.4414058508. The cubic root of 84500979 is about 438.8208424500.

The spelling of 84500979 in words is "eighty-four million, five hundred thousand, nine hundred seventy-nine".