16749647 has 2 divisors, whose sum is σ = 16749648. Its totient is φ = 16749646.

The previous prime is 16749637. The next prime is 16749679. The reversal of 16749647 is 74694761.

It is a weak prime.

It is an emirp because it is prime and its reverse (74694761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16749647 - 2¹⁴ = 16733263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16749598 and 16749607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16749637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8374823 + 8374824.

It is an arithmetic number, because the mean of its divisors is an integer number (8374824).

Almost surely, 2^16749647 is an apocalyptic number.

16749647 is a deficient number, since it is larger than the sum of its proper divisors (1).

16749647 is an equidigital number, since it uses as much as digits as its factorization.

16749647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 16749647 is about 4092.6332598951. The cubic root of 16749647 is about 255.8596999378.

The spelling of 16749647 in words is "sixteen million, seven hundred forty-nine thousand, six hundred forty-seven".