16442869 has 2 divisors, whose sum is σ = 16442870. Its totient is φ = 16442868.

The previous prime is 16442863. The next prime is 16442897. The reversal of 16442869 is 96824461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15563025 + 879844 = 3945^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442869 - 2²¹ = 14345717 is a prime.

It is a super-3 number, since 3×16442869³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16442863) 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, 8221434 + 8221435.

It is an arithmetic number, because the mean of its divisors is an integer number (8221435).

Almost surely, 2^16442869 is an apocalyptic number.

It is an amenable number.

16442869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442869 is an equidigital number, since it uses as much as digits as its factorization.

16442869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 16442869 is about 4054.9807644427. The cubic root of 16442869 is about 254.2879997360.

The spelling of 16442869 in words is "sixteen million, four hundred forty-two thousand, eight hundred sixty-nine".