16805539 has 2 divisors, whose sum is σ = 16805540. Its totient is φ = 16805538.

The previous prime is 16805521. The next prime is 16805563. The reversal of 16805539 is 93550861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16805539 - 2¹⁵ = 16772771 is a prime.

It is a super-2 number, since 2×16805539² = 564852282161042, which contains 22 as substring.

It is equal to p_1079587 and since 16805539 and 1079587 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16805498 and 16805507.

It is not a weakly prime, because it can be changed into another prime (16805339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402769 + 8402770.

It is an arithmetic number, because the mean of its divisors is an integer number (8402770).

Almost surely, 2^16805539 is an apocalyptic number.

16805539 is a deficient number, since it is larger than the sum of its proper divisors (1).

16805539 is an equidigital number, since it uses as much as digits as its factorization.

16805539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 16805539 is about 4099.4559395120. The cubic root of 16805539 is about 256.1439772380.

The spelling of 16805539 in words is "sixteen million, eight hundred five thousand, five hundred thirty-nine".