694078349 has 2 divisors, whose sum is σ = 694078350. Its totient is φ = 694078348.

The previous prime is 694078339. The next prime is 694078361. The reversal of 694078349 is 943870496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489073225 + 205005124 = 22115^2 + 14318^2 .

It is a cyclic number.

It is not a de Polignac number, because 694078349 - 2²⁰ = 693029773 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 694078297 and 694078306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694078309) 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, 347039174 + 347039175.

It is an arithmetic number, because the mean of its divisors is an integer number (347039175).

Almost surely, 2^694078349 is an apocalyptic number.

It is an amenable number.

694078349 is a deficient number, since it is larger than the sum of its proper divisors (1).

694078349 is an equidigital number, since it uses as much as digits as its factorization.

694078349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 694078349 is about 26345.3667463560. The cubic root of 694078349 is about 885.3931665143.

The spelling of 694078349 in words is "six hundred ninety-four million, seventy-eight thousand, three hundred forty-nine".