693866249 has 2 divisors, whose sum is σ = 693866250. Its totient is φ = 693866248.

The previous prime is 693866221. The next prime is 693866269. The reversal of 693866249 is 942668396.

693866249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667292224 + 26574025 = 25832^2 + 5155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693866249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 693866249.

It is not a weakly prime, because it can be changed into another prime (693866269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346933124 + 346933125.

It is an arithmetic number, because the mean of its divisors is an integer number (346933125).

Almost surely, 2^693866249 is an apocalyptic number.

It is an amenable number.

693866249 is a deficient number, since it is larger than the sum of its proper divisors (1).

693866249 is an equidigital number, since it uses as much as digits as its factorization.

693866249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 53.

The square root of 693866249 is about 26341.3410630514. The cubic root of 693866249 is about 885.3029696737.

The spelling of 693866249 in words is "six hundred ninety-three million, eight hundred sixty-six thousand, two hundred forty-nine".