84466861 has 2 divisors, whose sum is σ = 84466862. Its totient is φ = 84466860.

The previous prime is 84466843. The next prime is 84466867. The reversal of 84466861 is 16866448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82246761 + 2220100 = 9069^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 84466861 - 2¹⁵ = 84434093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84466867) 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, 42233430 + 42233431.

It is an arithmetic number, because the mean of its divisors is an integer number (42233431).

Almost surely, 2^84466861 is an apocalyptic number.

It is an amenable number.

84466861 is a deficient number, since it is larger than the sum of its proper divisors (1).

84466861 is an equidigital number, since it uses as much as digits as its factorization.

84466861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 84466861 is about 9190.5854546922. The cubic root of 84466861 is about 438.7617752648.

The spelling of 84466861 in words is "eighty-four million, four hundred sixty-six thousand, eight hundred sixty-one".