16830509 has 4 divisors (see below), whose sum is σ = 16994016. Its totient is φ = 16667004.

The previous prime is 16830497. The next prime is 16830533. The reversal of 16830509 is 90503861.

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 a de Polignac number, because none of the positive numbers 2^k-16830509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16830109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81599 + ... + 81804.

It is an arithmetic number, because the mean of its divisors is an integer number (4248504).

Almost surely, 2^16830509 is an apocalyptic number.

It is an amenable number.

16830509 is a deficient number, since it is larger than the sum of its proper divisors (163507).

16830509 is a wasteful number, since it uses less digits than its factorization.

16830509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163506.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 16830509 is about 4102.5003351615. The cubic root of 16830509 is about 256.2707757100.

The spelling of 16830509 in words is "sixteen million, eight hundred thirty thousand, five hundred nine".