84985579 has 8 divisors (see below), whose sum is σ = 99495648. Its totient is φ = 71067840.

The previous prime is 84985561. The next prime is 84985583. The reversal of 84985579 is 97558948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84985579 - 2⁷ = 84985451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84985519) 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 7 ways as a sum of consecutive naturals, for example, 147772 + ... + 148345.

It is an arithmetic number, because the mean of its divisors is an integer number (12436956).

Almost surely, 2^84985579 is an apocalyptic number.

84985579 is a deficient number, since it is larger than the sum of its proper divisors (14510069).

84985579 is a wasteful number, since it uses less digits than its factorization.

84985579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296165.

The product of its digits is 3628800, while the sum is 55.

The square root of 84985579 is about 9218.7623355850. The cubic root of 84985579 is about 439.6581004445.

The spelling of 84985579 in words is "eighty-four million, nine hundred eighty-five thousand, five hundred seventy-nine".