16744991 has 8 divisors (see below), whose sum is σ = 17332224. Its totient is φ = 16160760.

The previous prime is 16744969. The next prime is 16744993. The reversal of 16744991 is 19944761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16744991 - 2¹⁰ = 16743967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16744993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22166 + ... + 22908.

It is an arithmetic number, because the mean of its divisors is an integer number (2166528).

Almost surely, 2^16744991 is an apocalyptic number.

16744991 is a deficient number, since it is larger than the sum of its proper divisors (587233).

16744991 is an equidigital number, since it uses as much as digits as its factorization.

16744991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its digits is 54432, while the sum is 41.

The square root of 16744991 is about 4092.0643934327. The cubic root of 16744991 is about 255.8359901214.

The spelling of 16744991 in words is "sixteen million, seven hundred forty-four thousand, nine hundred ninety-one".