16679749 has 4 divisors (see below), whose sum is σ = 16687936. Its totient is φ = 16671564.

The previous prime is 16679699. The next prime is 16679759. The reversal of 16679749 is 94797661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16679749 - 2¹¹ = 16677701 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 (16679759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642 + ... + 6004.

It is an arithmetic number, because the mean of its divisors is an integer number (4171984).

Almost surely, 2^16679749 is an apocalyptic number.

It is an amenable number.

16679749 is a deficient number, since it is larger than the sum of its proper divisors (8187).

16679749 is an equidigital number, since it uses as much as digits as its factorization.

16679749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8186.

The product of its digits is 571536, while the sum is 49.

The square root of 16679749 is about 4084.0848424096. The cubic root of 16679749 is about 255.5032940881.

The spelling of 16679749 in words is "sixteen million, six hundred seventy-nine thousand, seven hundred forty-nine".