16750009 has 2 divisors, whose sum is σ = 16750010. Its totient is φ = 16750008.

The previous prime is 16749979. The next prime is 16750021. The reversal of 16750009 is 90005761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14845609 + 1904400 = 3853^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 16750009 - 2⁷ = 16749881 is a prime.

It is not a weakly prime, because it can be changed into another prime (16750079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8375004 + 8375005.

It is an arithmetic number, because the mean of its divisors is an integer number (8375005).

Almost surely, 2^16750009 is an apocalyptic number.

It is an amenable number.

16750009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16750009 is an equidigital number, since it uses as much as digits as its factorization.

16750009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 16750009 is about 4092.6774854611. The cubic root of 16750009 is about 255.8615431715.

It can be divided in two parts, 167 and 50009, that added together give a square (50176 = 224²).

The spelling of 16750009 in words is "sixteen million, seven hundred fifty thousand, nine".