84221479 has 8 divisors (see below), whose sum is σ = 85814640. Its totient is φ = 82638336.

The previous prime is 84221453. The next prime is 84221483. The reversal of 84221479 is 97412248.

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

It is not a de Polignac number, because 84221479 - 2¹¹ = 84219431 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 (84221429) 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, 15687 + ... + 20359.

It is an arithmetic number, because the mean of its divisors is an integer number (10726830).

Almost surely, 2^84221479 is an apocalyptic number.

84221479 is a deficient number, since it is larger than the sum of its proper divisors (1593161).

84221479 is a wasteful number, since it uses less digits than its factorization.

With its successor (84221480) it forms an eRAP, since the sums of their prime factors are consecutive (5009 and 5010).

84221479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009.

The product of its digits is 32256, while the sum is 37.

The square root of 84221479 is about 9177.2261059647. The cubic root of 84221479 is about 438.3364855256.

The spelling of 84221479 in words is "eighty-four million, two hundred twenty-one thousand, four hundred seventy-nine".