16945849 has 4 divisors (see below), whose sum is σ = 17265636. Its totient is φ = 16626064.

The previous prime is 16945847. The next prime is 16945909. The reversal of 16945849 is 94854961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94854961 = 109 ⋅870229.

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 3732624 = 3635^2 + 1932^2 .

It is a cyclic number.

It is not a de Polignac number, because 16945849 - 2¹ = 16945847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16945799 and 16945808.

It is not an unprimeable number, because it can be changed into a prime (16945843) 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, 159814 + ... + 159919.

It is an arithmetic number, because the mean of its divisors is an integer number (4316409).

Almost surely, 2^16945849 is an apocalyptic number.

It is an amenable number.

16945849 is a deficient number, since it is larger than the sum of its proper divisors (319787).

16945849 is an equidigital number, since it uses as much as digits as its factorization.

16945849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319786.

The product of its digits is 311040, while the sum is 46.

The square root of 16945849 is about 4116.5336145840. The cubic root of 16945849 is about 256.8548540232.

The spelling of 16945849 in words is "sixteen million, nine hundred forty-five thousand, eight hundred forty-nine".