84565801 has 2 divisors, whose sum is σ = 84565802. Its totient is φ = 84565800.

The previous prime is 84565763. The next prime is 84565813. The reversal of 84565801 is 10856548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 9916201 = 8640^2 + 3149^2 .

It is a cyclic number.

It is not a de Polignac number, because 84565801 - 2⁷ = 84565673 is a prime.

It is not a weakly prime, because it can be changed into another prime (84565601) 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, 42282900 + 42282901.

It is an arithmetic number, because the mean of its divisors is an integer number (42282901).

Almost surely, 2^84565801 is an apocalyptic number.

It is an amenable number.

84565801 is a deficient number, since it is larger than the sum of its proper divisors (1).

84565801 is an equidigital number, since it uses as much as digits as its factorization.

84565801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 84565801 is about 9195.9665614877. The cubic root of 84565801 is about 438.9330225079.

The spelling of 84565801 in words is "eighty-four million, five hundred sixty-five thousand, eight hundred one".