28693361 has 2 divisors, whose sum is σ = 28693362. Its totient is φ = 28693360.

The previous prime is 28693319. The next prime is 28693367. The reversal of 28693361 is 16339682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 11262736 = 4175^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 28693361 - 2¹⁸ = 28431217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28693367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14346680 + 14346681.

It is an arithmetic number, because the mean of its divisors is an integer number (14346681).

Almost surely, 2^28693361 is an apocalyptic number.

It is an amenable number.

28693361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28693361 is an equidigital number, since it uses as much as digits as its factorization.

28693361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 28693361 is about 5356.6184295692. The cubic root of 28693361 is about 306.1449787890.

The spelling of 28693361 in words is "twenty-eight million, six hundred ninety-three thousand, three hundred sixty-one".