16686479 has 2 divisors, whose sum is σ = 16686480. Its totient is φ = 16686478.

The previous prime is 16686437. The next prime is 16686487. The reversal of 16686479 is 97468661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16686479 - 2¹⁶ = 16620943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16686409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8343239 + 8343240.

It is an arithmetic number, because the mean of its divisors is an integer number (8343240).

Almost surely, 2^16686479 is an apocalyptic number.

16686479 is a deficient number, since it is larger than the sum of its proper divisors (1).

16686479 is an equidigital number, since it uses as much as digits as its factorization.

16686479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 16686479 is about 4084.9086893100. The cubic root of 16686479 is about 255.5376532373.

The spelling of 16686479 in words is "sixteen million, six hundred eighty-six thousand, four hundred seventy-nine".