16945749 has 6 divisors (see below), whose sum is σ = 24477206. Its totient is φ = 11297160.

The previous prime is 16945729. The next prime is 16945759. The reversal of 16945749 is 94754961.

It can be written as a sum of positive squares in only one way, i.e., 13373649 + 3572100 = 3657^2 + 1890^2 .

It is not a de Polignac number, because 16945749 - 2⁵ = 16945717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16945729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 941422 + ... + 941439.

Almost surely, 2^16945749 is an apocalyptic number.

It is an amenable number.

16945749 is a deficient number, since it is larger than the sum of its proper divisors (7531457).

16945749 is a wasteful number, since it uses less digits than its factorization.

16945749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882867 (or 1882864 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 16945749 is about 4116.5214684245. The cubic root of 16945749 is about 256.8543487758.

The spelling of 16945749 in words is "sixteen million, nine hundred forty-five thousand, seven hundred forty-nine".