84772213 has 2 divisors, whose sum is σ = 84772214. Its totient is φ = 84772212.

The previous prime is 84772211. The next prime is 84772223. The reversal of 84772213 is 31227748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84768849 + 3364 = 9207^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 84772213 - 2¹ = 84772211 is a prime.

Together with 84772211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84772211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42386106 + 42386107.

It is an arithmetic number, because the mean of its divisors is an integer number (42386107).

Almost surely, 2^84772213 is an apocalyptic number.

It is an amenable number.

84772213 is a deficient number, since it is larger than the sum of its proper divisors (1).

84772213 is an equidigital number, since it uses as much as digits as its factorization.

84772213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 84772213 is about 9207.1826852735. The cubic root of 84772213 is about 439.2898548105.

The spelling of 84772213 in words is "eighty-four million, seven hundred seventy-two thousand, two hundred thirteen".