16816749 has 16 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 10670000.

The previous prime is 16816747. The next prime is 16816753. The reversal of 16816749 is 94761861.

It is a cyclic number.

It is not a de Polignac number, because 16816749 - 2¹ = 16816747 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16816749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16816747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16834 + ... + 17804.

It is an arithmetic number, because the mean of its divisors is an integer number (1469664).

Almost surely, 2^16816749 is an apocalyptic number.

It is an amenable number.

16816749 is a deficient number, since it is larger than the sum of its proper divisors (6697875).

16816749 is a wasteful number, since it uses less digits than its factorization.

16816749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its digits is 72576, while the sum is 42.

The square root of 16816749 is about 4100.8229661862. The cubic root of 16816749 is about 256.2009175079.

The spelling of 16816749 in words is "sixteen million, eight hundred sixteen thousand, seven hundred forty-nine".