16930509 has 4 divisors (see below), whose sum is σ = 22574016. Its totient is φ = 11287004.

The previous prime is 16930493. The next prime is 16930513. The reversal of 16930509 is 90503961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16930509 - 2⁴ = 16930493 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16930509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16930549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821749 + ... + 2821754.

It is an arithmetic number, because the mean of its divisors is an integer number (5643504).

Almost surely, 2^16930509 is an apocalyptic number.

It is an amenable number.

16930509 is a deficient number, since it is larger than the sum of its proper divisors (5643507).

16930509 is an equidigital number, since it uses as much as digits as its factorization.

16930509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643506.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 16930509 is about 4114.6699746152. The cubic root of 16930509 is about 256.7773258336. Note that the first 3 decimals are identical.

The spelling of 16930509 in words is "sixteen million, nine hundred thirty thousand, five hundred nine".