84142213 has 2 divisors, whose sum is σ = 84142214. Its totient is φ = 84142212.

The previous prime is 84142207. The next prime is 84142243. The reversal of 84142213 is 31224148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 20493729 = 7978^2 + 4527^2 .

It is a cyclic number.

It is not a de Polignac number, because 84142213 - 2¹³ = 84134021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84142243) 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, 42071106 + 42071107.

It is an arithmetic number, because the mean of its divisors is an integer number (42071107).

Almost surely, 2^84142213 is an apocalyptic number.

It is an amenable number.

84142213 is a deficient number, since it is larger than the sum of its proper divisors (1).

84142213 is an equidigital number, since it uses as much as digits as its factorization.

84142213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 84142213 is about 9172.9064641476. The cubic root of 84142213 is about 438.1989272438.

The spelling of 84142213 in words is "eighty-four million, one hundred forty-two thousand, two hundred thirteen".