16719349 has 4 divisors (see below), whose sum is σ = 17127180. Its totient is φ = 16311520.

The previous prime is 16719331. The next prime is 16719371. The reversal of 16719349 is 94391761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94391761 = 151 ⋅625111.

It can be written as a sum of positive squares in 2 ways, for example, as 260100 + 16459249 = 510^2 + 4057^2 .

It is a cyclic number.

It is not a de Polignac number, because 16719349 - 2⁵ = 16719317 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16719379) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203854 + ... + 203935.

It is an arithmetic number, because the mean of its divisors is an integer number (4281795).

Almost surely, 2^16719349 is an apocalyptic number.

It is an amenable number.

16719349 is a deficient number, since it is larger than the sum of its proper divisors (407831).

16719349 is an equidigital number, since it uses as much as digits as its factorization.

16719349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407830.

The product of its digits is 40824, while the sum is 40.

The square root of 16719349 is about 4088.9300556503. The cubic root of 16719349 is about 255.7053341762.

The spelling of 16719349 in words is "sixteen million, seven hundred nineteen thousand, three hundred forty-nine".