84221429 has 2 divisors, whose sum is σ = 84221430. Its totient is φ = 84221428.

The previous prime is 84221393. The next prime is 84221437. The reversal of 84221429 is 92412248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 40804 = 9175^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 84221429 - 2¹⁶ = 84155893 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84221395 and 84221404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84221329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42110714 + 42110715.

It is an arithmetic number, because the mean of its divisors is an integer number (42110715).

Almost surely, 2^84221429 is an apocalyptic number.

It is an amenable number.

84221429 is a deficient number, since it is larger than the sum of its proper divisors (1).

84221429 is an equidigital number, since it uses as much as digits as its factorization.

84221429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 84221429 is about 9177.2233818296. The cubic root of 84221429 is about 438.3363987828.

The spelling of 84221429 in words is "eighty-four million, two hundred twenty-one thousand, four hundred twenty-nine".