16845709 has 4 divisors (see below), whose sum is σ = 16860160. Its totient is φ = 16831260.

The previous prime is 16845707. The next prime is 16845713. The reversal of 16845709 is 90754861.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90754861 = 5851 ⋅15511.

It is a cyclic number.

It is not a de Polignac number, because 16845709 - 2¹ = 16845707 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 (16845707) 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, 5307 + ... + 7864.

It is an arithmetic number, because the mean of its divisors is an integer number (4215040).

Almost surely, 2^16845709 is an apocalyptic number.

It is an amenable number.

16845709 is a deficient number, since it is larger than the sum of its proper divisors (14451).

16845709 is a wasteful number, since it uses less digits than its factorization.

16845709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 16845709 is about 4104.3524458799. The cubic root of 16845709 is about 256.3479004071.

The spelling of 16845709 in words is "sixteen million, eight hundred forty-five thousand, seven hundred nine".