84091229 has 2 divisors, whose sum is σ = 84091230. Its totient is φ = 84091228.

The previous prime is 84091177. The next prime is 84091253. The reversal of 84091229 is 92219048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73188025 + 10903204 = 8555^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 84091229 - 2²⁰ = 83042653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84091529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42045614 + 42045615.

It is an arithmetic number, because the mean of its divisors is an integer number (42045615).

Almost surely, 2^84091229 is an apocalyptic number.

It is an amenable number.

84091229 is a deficient number, since it is larger than the sum of its proper divisors (1).

84091229 is an equidigital number, since it uses as much as digits as its factorization.

84091229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 84091229 is about 9170.1269893061. The cubic root of 84091229 is about 438.1104039085.

The spelling of 84091229 in words is "eighty-four million, ninety-one thousand, two hundred twenty-nine".