84228679 has 2 divisors, whose sum is σ = 84228680. Its totient is φ = 84228678.

The previous prime is 84228631. The next prime is 84228721. The reversal of 84228679 is 97682248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84228679 - 2⁹ = 84228167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84228379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42114339 + 42114340.

It is an arithmetic number, because the mean of its divisors is an integer number (42114340).

Almost surely, 2^84228679 is an apocalyptic number.

84228679 is a deficient number, since it is larger than the sum of its proper divisors (1).

84228679 is an equidigital number, since it uses as much as digits as its factorization.

84228679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 84228679 is about 9177.6183729767. The cubic root of 84228679 is about 438.3489761349.

The spelling of 84228679 in words is "eighty-four million, two hundred twenty-eight thousand, six hundred seventy-nine".