16679281 has 2 divisors, whose sum is σ = 16679282. Its totient is φ = 16679280.

The previous prime is 16679239. The next prime is 16679287. The reversal of 16679281 is 18297661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 225 = 4084^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 16679281 - 2¹³ = 16671089 is a prime.

It is a super-2 number, since 2×16679281² = 556396829353922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16679287) 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, 8339640 + 8339641.

It is an arithmetic number, because the mean of its divisors is an integer number (8339641).

Almost surely, 2^16679281 is an apocalyptic number.

It is an amenable number.

16679281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16679281 is an equidigital number, since it uses as much as digits as its factorization.

16679281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 16679281 is about 4084.0275464301. The cubic root of 16679281 is about 255.5009044306.

The spelling of 16679281 in words is "sixteen million, six hundred seventy-nine thousand, two hundred eighty-one".