84293221 has 2 divisors, whose sum is σ = 84293222. Its totient is φ = 84293220.

The previous prime is 84293219. The next prime is 84293249. The reversal of 84293221 is 12239248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 2842596 = 9025^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 84293221 - 2¹ = 84293219 is a prime.

Together with 84293219, 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 (84293281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42146610 + 42146611.

It is an arithmetic number, because the mean of its divisors is an integer number (42146611).

Almost surely, 2^84293221 is an apocalyptic number.

It is an amenable number.

84293221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84293221 is an equidigital number, since it uses as much as digits as its factorization.

84293221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 84293221 is about 9181.1339713567. The cubic root of 84293221 is about 438.4609122617.

The spelling of 84293221 in words is "eighty-four million, two hundred ninety-three thousand, two hundred twenty-one".