16679947 has 2 divisors, whose sum is σ = 16679948. Its totient is φ = 16679946.

The previous prime is 16679939. The next prime is 16679951. The reversal of 16679947 is 74997661.

16679947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (74997661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16679947 - 2³ = 16679939 is a prime.

It is a super-3 number, since 3×16679947³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16679947.

It is not a weakly prime, because it can be changed into another prime (16679917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339973 + 8339974.

It is an arithmetic number, because the mean of its divisors is an integer number (8339974).

Almost surely, 2^16679947 is an apocalyptic number.

16679947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16679947 is an equidigital number, since it uses as much as digits as its factorization.

16679947 is an evil number, because the sum of its binary digits is even.

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

The square root of 16679947 is about 4084.1090827744. The cubic root of 16679947 is about 255.5043050836.

The spelling of 16679947 in words is "sixteen million, six hundred seventy-nine thousand, nine hundred forty-seven".