16015009 has 2 divisors, whose sum is σ = 16015010. Its totient is φ = 16015008.

The previous prime is 16015007. The next prime is 16015057. The reversal of 16015009 is 90051061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 2117025 = 3728^2 + 1455^2 .

It is a cyclic number.

It is not a de Polignac number, because 16015009 - 2¹ = 16015007 is a prime.

Together with 16015007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16015007) 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, 8007504 + 8007505.

It is an arithmetic number, because the mean of its divisors is an integer number (8007505).

Almost surely, 2^16015009 is an apocalyptic number.

It is an amenable number.

16015009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16015009 is an equidigital number, since it uses as much as digits as its factorization.

16015009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 16015009 is about 4001.8756852256. The cubic root of 16015009 is about 252.0629776671.

The spelling of 16015009 in words is "sixteen million, fifteen thousand, nine".