16616539 has 2 divisors, whose sum is σ = 16616540. Its totient is φ = 16616538.

The previous prime is 16616513. The next prime is 16616543. The reversal of 16616539 is 93561661.

It is a strong prime.

It is an emirp because it is prime and its reverse (93561661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16616539 - 2⁹ = 16616027 is a prime.

It is a super-2 number, since 2×16616539² = 552218736677042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16616498 and 16616507.

It is not a weakly prime, because it can be changed into another prime (16616549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308269 + 8308270.

It is an arithmetic number, because the mean of its divisors is an integer number (8308270).

Almost surely, 2^16616539 is an apocalyptic number.

16616539 is a deficient number, since it is larger than the sum of its proper divisors (1).

16616539 is an equidigital number, since it uses as much as digits as its factorization.

16616539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 16616539 is about 4076.3389211399. The cubic root of 16616539 is about 255.1801316002.

The spelling of 16616539 in words is "sixteen million, six hundred sixteen thousand, five hundred thirty-nine".