84163309 has 2 divisors, whose sum is σ = 84163310. Its totient is φ = 84163308.

The previous prime is 84163301. The next prime is 84163327. The reversal of 84163309 is 90336148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 40998409 = 6570^2 + 6403^2 .

It is a cyclic number.

It is not a de Polignac number, because 84163309 - 2³ = 84163301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84163301) 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, 42081654 + 42081655.

It is an arithmetic number, because the mean of its divisors is an integer number (42081655).

Almost surely, 2^84163309 is an apocalyptic number.

It is an amenable number.

84163309 is a deficient number, since it is larger than the sum of its proper divisors (1).

84163309 is an equidigital number, since it uses as much as digits as its factorization.

84163309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 84163309 is about 9174.0563002415. The cubic root of 84163309 is about 438.2355456932.

The spelling of 84163309 in words is "eighty-four million, one hundred sixty-three thousand, three hundred nine".