84232009 has 2 divisors, whose sum is σ = 84232010. Its totient is φ = 84232008.

The previous prime is 84231977. The next prime is 84232013. The reversal of 84232009 is 90023248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78375609 + 5856400 = 8853^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 84232009 - 2⁵ = 84231977 is a prime.

It is a Chen prime.

It is equal to p_4901716 and since 84232009 and 4901716 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (84232069) 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, 42116004 + 42116005.

It is an arithmetic number, because the mean of its divisors is an integer number (42116005).

Almost surely, 2^84232009 is an apocalyptic number.

It is an amenable number.

84232009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84232009 is an equidigital number, since it uses as much as digits as its factorization.

84232009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 84232009 is about 9177.7997907995. The cubic root of 84232009 is about 438.3547528010.

The spelling of 84232009 in words is "eighty-four million, two hundred thirty-two thousand, nine".