694947389 has 2 divisors, whose sum is σ = 694947390. Its totient is φ = 694947388.

The previous prime is 694947353. The next prime is 694947413. The reversal of 694947389 is 983749496.

694947389 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., 401681764 + 293265625 = 20042^2 + 17125^2 .

It is a cyclic number.

It is not a de Polignac number, because 694947389 - 2¹⁶ = 694881853 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 (694947889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347473694 + 347473695.

It is an arithmetic number, because the mean of its divisors is an integer number (347473695).

Almost surely, 2^694947389 is an apocalyptic number.

It is an amenable number.

694947389 is a deficient number, since it is larger than the sum of its proper divisors (1).

694947389 is an equidigital number, since it uses as much as digits as its factorization.

694947389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 59.

The square root of 694947389 is about 26361.8548095539. The cubic root of 694947389 is about 885.7625393995.

The spelling of 694947389 in words is "six hundred ninety-four million, nine hundred forty-seven thousand, three hundred eighty-nine".