16991149 has 16 divisors (see below), whose sum is σ = 20922880. Its totient is φ = 13471920.

The previous prime is 16991147. The next prime is 16991153. The reversal of 16991149 is 94119961.

It is not a de Polignac number, because 16991149 - 2¹ = 16991147 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 (16991147) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (1307680).

Almost surely, 2^16991149 is an apocalyptic number.

16991149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16991149 is a deficient number, since it is larger than the sum of its proper divisors (3931731).

16991149 is a wasteful number, since it uses less digits than its factorization.

16991149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040.

The product of its digits is 17496, while the sum is 40.

The square root of 16991149 is about 4122.0321444647. The cubic root of 16991149 is about 257.0835269792.

The spelling of 16991149 in words is "sixteen million, nine hundred ninety-one thousand, one hundred forty-nine".