28669169 has 2 divisors, whose sum is σ = 28669170. Its totient is φ = 28669168.

The previous prime is 28669111. The next prime is 28669183. The reversal of 28669169 is 96196682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 9859600 = 4337^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 28669169 - 2¹⁶ = 28603633 is a prime.

It is a super-2 number, since 2×28669169² = 1643842502301122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28669189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334584 + 14334585.

It is an arithmetic number, because the mean of its divisors is an integer number (14334585).

Almost surely, 2^28669169 is an apocalyptic number.

It is an amenable number.

28669169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669169 is an equidigital number, since it uses as much as digits as its factorization.

28669169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 28669169 is about 5354.3598123398. The cubic root of 28669169 is about 306.0589154221.

The spelling of 28669169 in words is "twenty-eight million, six hundred sixty-nine thousand, one hundred sixty-nine".