16993849 has 4 divisors (see below), whose sum is σ = 17732736. Its totient is φ = 16254964.

The previous prime is 16993831. The next prime is 16993853. The reversal of 16993849 is 94839961.

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.

It is a cyclic number.

It is not a de Polignac number, because 16993849 - 2⁵ = 16993817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16993819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369409 + ... + 369454.

It is an arithmetic number, because the mean of its divisors is an integer number (4433184).

Almost surely, 2^16993849 is an apocalyptic number.

It is an amenable number.

16993849 is a deficient number, since it is larger than the sum of its proper divisors (738887).

16993849 is an equidigital number, since it uses as much as digits as its factorization.

16993849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738886.

The product of its digits is 419904, while the sum is 49.

The square root of 16993849 is about 4122.3596398180. The cubic root of 16993849 is about 257.0971436521.

The spelling of 16993849 in words is "sixteen million, nine hundred ninety-three thousand, eight hundred forty-nine".