84213247 has 2 divisors, whose sum is σ = 84213248. Its totient is φ = 84213246.

The previous prime is 84213229. The next prime is 84213277. The reversal of 84213247 is 74231248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84213247 - 2¹⁵ = 84180479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84213277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42106623 + 42106624.

It is an arithmetic number, because the mean of its divisors is an integer number (42106624).

Almost surely, 2^84213247 is an apocalyptic number.

84213247 is a deficient number, since it is larger than the sum of its proper divisors (1).

84213247 is an equidigital number, since it uses as much as digits as its factorization.

84213247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

The square root of 84213247 is about 9176.7775934693. Note that the first 3 decimals coincide. The cubic root of 84213247 is about 438.3222037234.

The spelling of 84213247 in words is "eighty-four million, two hundred thirteen thousand, two hundred forty-seven".