84019213 has 2 divisors, whose sum is σ = 84019214. Its totient is φ = 84019212.

The previous prime is 84019189. The next prime is 84019217. The reversal of 84019213 is 31291048.

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., 47513449 + 36505764 = 6893^2 + 6042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84019213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84019217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42009606 + 42009607.

It is an arithmetic number, because the mean of its divisors is an integer number (42009607).

Almost surely, 2^84019213 is an apocalyptic number.

It is an amenable number.

84019213 is a deficient number, since it is larger than the sum of its proper divisors (1).

84019213 is an equidigital number, since it uses as much as digits as its factorization.

84019213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 84019213 is about 9166.1994850647. The cubic root of 84019213 is about 437.9853018010.

The spelling of 84019213 in words is "eighty-four million, nineteen thousand, two hundred thirteen".