16690673 has 2 divisors, whose sum is σ = 16690674. Its totient is φ = 16690672.

The previous prime is 16690657. The next prime is 16690691. The reversal of 16690673 is 37609661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13126129 + 3564544 = 3623^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 16690673 - 2⁴ = 16690657 is a prime.

It is a super-3 number, since 3×16690673³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16690603) 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, 8345336 + 8345337.

It is an arithmetic number, because the mean of its divisors is an integer number (8345337).

Almost surely, 2^16690673 is an apocalyptic number.

It is an amenable number.

16690673 is a deficient number, since it is larger than the sum of its proper divisors (1).

16690673 is an equidigital number, since it uses as much as digits as its factorization.

16690673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 16690673 is about 4085.4220100254. The cubic root of 16690673 is about 255.5590604924.

The spelling of 16690673 in words is "sixteen million, six hundred ninety thousand, six hundred seventy-three".