16690939 has 8 divisors (see below), whose sum is σ = 17656992. Its totient is φ = 15744960.

The previous prime is 16690913. The next prime is 16690963. The reversal of 16690939 is 93909661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16690939 - 2¹⁷ = 16559867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16690895 and 16690904.

It is not an unprimeable number, because it can be changed into a prime (16690909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (2207124).

Almost surely, 2^16690939 is an apocalyptic number.

16690939 is a deficient number, since it is larger than the sum of its proper divisors (966053).

16690939 is an equidigital number, since it uses as much as digits as its factorization.

16690939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10037.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 16690939 is about 4085.4545646721. The cubic root of 16690939 is about 255.5604181039.

The spelling of 16690939 in words is "sixteen million, six hundred ninety thousand, nine hundred thirty-nine".