84367009 has 2 divisors, whose sum is σ = 84367010. Its totient is φ = 84367008.

The previous prime is 84367001. The next prime is 84367033. The reversal of 84367009 is 90076348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 33315984 = 7145^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 84367009 - 2³ = 84367001 is a prime.

It is not a weakly prime, because it can be changed into another prime (84367001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42183504 + 42183505.

It is an arithmetic number, because the mean of its divisors is an integer number (42183505).

Almost surely, 2^84367009 is an apocalyptic number.

It is an amenable number.

84367009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84367009 is an equidigital number, since it uses as much as digits as its factorization.

84367009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 84367009 is about 9185.1515501923. The cubic root of 84367009 is about 438.5888138795.

The spelling of 84367009 in words is "eighty-four million, three hundred sixty-seven thousand, nine".