84362009 has 2 divisors, whose sum is σ = 84362010. Its totient is φ = 84362008.

The previous prime is 84361993. The next prime is 84362021. The reversal of 84362009 is 90026348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45859984 + 38502025 = 6772^2 + 6205^2 .

It is a cyclic number.

It is not a de Polignac number, because 84362009 - 2⁴ = 84361993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84362099) 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, 42181004 + 42181005.

It is an arithmetic number, because the mean of its divisors is an integer number (42181005).

Almost surely, 2^84362009 is an apocalyptic number.

It is an amenable number.

84362009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84362009 is an equidigital number, since it uses as much as digits as its factorization.

84362009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 84362009 is about 9184.8793677435. The cubic root of 84362009 is about 438.5801494050.

The spelling of 84362009 in words is "eighty-four million, three hundred sixty-two thousand, nine".