16540169 has 2 divisors, whose sum is σ = 16540170. Its totient is φ = 16540168.

The previous prime is 16540163. The next prime is 16540171. The reversal of 16540169 is 96104561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13227769 + 3312400 = 3637^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 16540169 - 2¹² = 16536073 is a prime.

It is a super-2 number, since 2×16540169² = 547154381097122, which contains 22 as substring.

Together with 16540171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16540163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270084 + 8270085.

It is an arithmetic number, because the mean of its divisors is an integer number (8270085).

Almost surely, 2^16540169 is an apocalyptic number.

It is an amenable number.

16540169 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540169 is an equidigital number, since it uses as much as digits as its factorization.

16540169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 16540169 is about 4066.9606587721. The cubic root of 16540169 is about 254.7885932048.

The spelling of 16540169 in words is "sixteen million, five hundred forty thousand, one hundred sixty-nine".