16973509 has 8 divisors (see below), whose sum is σ = 19424000. Its totient is φ = 14529456.

The previous prime is 16973507. The next prime is 16973513. The reversal of 16973509 is 90537961.

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 16973509 - 2¹ = 16973507 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 (16973501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7492 + ... + 9490.

It is an arithmetic number, because the mean of its divisors is an integer number (2428000).

Almost surely, 2^16973509 is an apocalyptic number.

It is an amenable number.

16973509 is a deficient number, since it is larger than the sum of its proper divisors (2450491).

16973509 is a wasteful number, since it uses less digits than its factorization.

16973509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 16973509 is about 4119.8918675130. The cubic root of 16973509 is about 256.9945291976.

The spelling of 16973509 in words is "sixteen million, nine hundred seventy-three thousand, five hundred nine".