694549213 has 2 divisors, whose sum is σ = 694549214. Its totient is φ = 694549212.

The previous prime is 694549211. The next prime is 694549267. The reversal of 694549213 is 312945496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572070724 + 122478489 = 23918^2 + 11067^2 .

It is a cyclic number.

It is not a de Polignac number, because 694549213 - 2¹ = 694549211 is a prime.

Together with 694549211, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 694549213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694549211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347274606 + 347274607.

It is an arithmetic number, because the mean of its divisors is an integer number (347274607).

Almost surely, 2^694549213 is an apocalyptic number.

It is an amenable number.

694549213 is a deficient number, since it is larger than the sum of its proper divisors (1).

694549213 is an equidigital number, since it uses as much as digits as its factorization.

694549213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 694549213 is about 26354.3016033436. The cubic root of 694549213 is about 885.5933386942.

The spelling of 694549213 in words is "six hundred ninety-four million, five hundred forty-nine thousand, two hundred thirteen".