84006889 has 2 divisors, whose sum is σ = 84006890. Its totient is φ = 84006888.

The previous prime is 84006841. The next prime is 84006913. The reversal of 84006889 is 98860048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70560000 + 13446889 = 8400^2 + 3667^2 .

It is a cyclic number.

It is not a de Polignac number, because 84006889 - 2¹³ = 83998697 is a prime.

It is not a weakly prime, because it can be changed into another prime (84006829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42003444 + 42003445.

It is an arithmetic number, because the mean of its divisors is an integer number (42003445).

Almost surely, 2^84006889 is an apocalyptic number.

It is an amenable number.

84006889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84006889 is an equidigital number, since it uses as much as digits as its factorization.

84006889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 84006889 is about 9165.5272079679. The cubic root of 84006889 is about 437.9638860851.

The spelling of 84006889 in words is "eighty-four million, six thousand, eight hundred eighty-nine".