16679987 has 2 divisors, whose sum is σ = 16679988. Its totient is φ = 16679986.

The previous prime is 16679977. The next prime is 16680019. The reversal of 16679987 is 78997661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78997661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16679987 - 2¹² = 16675891 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16679917) 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 as a sum of consecutive naturals, namely, 8339993 + 8339994.

It is an arithmetic number, because the mean of its divisors is an integer number (8339994).

Almost surely, 2^16679987 is an apocalyptic number.

16679987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16679987 is an equidigital number, since it uses as much as digits as its factorization.

16679987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 16679987 is about 4084.1139798003. The cubic root of 16679987 is about 255.5045093241.

The spelling of 16679987 in words is "sixteen million, six hundred seventy-nine thousand, nine hundred eighty-seven".