84083221 has 2 divisors, whose sum is σ = 84083222. Its totient is φ = 84083220.

The previous prime is 84083179. The next prime is 84083257. The reversal of 84083221 is 12238048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 12680721 = 8450^2 + 3561^2 .

It is a cyclic number.

It is not a de Polignac number, because 84083221 - 2¹³ = 84075029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84083221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84083261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42041610 + 42041611.

It is an arithmetic number, because the mean of its divisors is an integer number (42041611).

Almost surely, 2^84083221 is an apocalyptic number.

It is an amenable number.

84083221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84083221 is an equidigital number, since it uses as much as digits as its factorization.

84083221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 84083221 is about 9169.6903437357. The cubic root of 84083221 is about 438.0964963959.

The spelling of 84083221 in words is "eighty-four million, eighty-three thousand, two hundred twenty-one".