16809597 has 36 divisors (see below), whose sum is σ = 28881216. Its totient is φ = 9389520.

The previous prime is 16809557. The next prime is 16809601. The reversal of 16809597 is 79590861.

It is not a de Polignac number, because 16809597 - 2⁷ = 16809469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16809557) 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 35 ways as a sum of consecutive naturals, for example, 20322 + ... + 21132.

It is an arithmetic number, because the mean of its divisors is an integer number (802256).

Almost surely, 2^16809597 is an apocalyptic number.

It is an amenable number.

16809597 is a deficient number, since it is larger than the sum of its proper divisors (12071619).

16809597 is a wasteful number, since it uses less digits than its factorization.

16809597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 16809597 is about 4099.9508533640. The cubic root of 16809597 is about 256.1645924373.

The spelling of 16809597 in words is "sixteen million, eight hundred nine thousand, five hundred ninety-seven".