84985221 has 4 divisors (see below), whose sum is σ = 113313632. Its totient is φ = 56656812.

The previous prime is 84985217. The next prime is 84985231. The reversal of 84985221 is 12258948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 84985221 - 2² = 84985217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84985221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84985211) 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, 14164201 + ... + 14164206.

It is an arithmetic number, because the mean of its divisors is an integer number (28328408).

Almost surely, 2^84985221 is an apocalyptic number.

It is an amenable number.

84985221 is a deficient number, since it is larger than the sum of its proper divisors (28328411).

84985221 is a wasteful number, since it uses less digits than its factorization.

84985221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28328410.

The product of its digits is 46080, while the sum is 39.

The square root of 84985221 is about 9218.7429186413. The cubic root of 84985221 is about 439.6574830934.

The spelling of 84985221 in words is "eighty-four million, nine hundred eighty-five thousand, two hundred twenty-one".