28169693 has 2 divisors, whose sum is σ = 28169694. Its totient is φ = 28169692.

The previous prime is 28169683. The next prime is 28169707. The reversal of 28169693 is 39696182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 11539609 = 4078^2 + 3397^2 .

It is a cyclic number.

It is not a de Polignac number, because 28169693 - 2⁸ = 28169437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28169683) 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, 14084846 + 14084847.

It is an arithmetic number, because the mean of its divisors is an integer number (14084847).

Almost surely, 2^28169693 is an apocalyptic number.

It is an amenable number.

28169693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28169693 is an equidigital number, since it uses as much as digits as its factorization.

28169693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 28169693 is about 5307.5128826975. The cubic root of 28169693 is about 304.2711000707.

The spelling of 28169693 in words is "twenty-eight million, one hundred sixty-nine thousand, six hundred ninety-three".