84220689 has 8 divisors (see below), whose sum is σ = 128336320. Its totient is φ = 48126096.

The previous prime is 84220649. The next prime is 84220691. The reversal of 84220689 is 98602248.

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

It is not a de Polignac number, because 84220689 - 2²⁵ = 50666257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84220639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005234 + ... + 2005275.

It is an arithmetic number, because the mean of its divisors is an integer number (16042040).

Almost surely, 2^84220689 is an apocalyptic number.

It is an amenable number.

84220689 is a deficient number, since it is larger than the sum of its proper divisors (44115631).

84220689 is a wasteful number, since it uses less digits than its factorization.

84220689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010519.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 84220689 is about 9177.1830645357. The cubic root of 84220689 is about 438.3351149849.

The spelling of 84220689 in words is "eighty-four million, two hundred twenty thousand, six hundred eighty-nine".