84217061 has 2 divisors, whose sum is σ = 84217062. Its totient is φ = 84217060.

The previous prime is 84217043. The next prime is 84217087. The reversal of 84217061 is 16071248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83156161 + 1060900 = 9119^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 84217061 - 2¹⁸ = 83954917 is a prime.

It is a super-4 number, since 4×84217061⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84217961) 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, 42108530 + 42108531.

It is an arithmetic number, because the mean of its divisors is an integer number (42108531).

Almost surely, 2^84217061 is an apocalyptic number.

It is an amenable number.

84217061 is a deficient number, since it is larger than the sum of its proper divisors (1).

84217061 is an equidigital number, since it uses as much as digits as its factorization.

84217061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 84217061 is about 9176.9853982667. The cubic root of 84217061 is about 438.3288207965.

The spelling of 84217061 in words is "eighty-four million, two hundred seventeen thousand, sixty-one".