694349861 has 2 divisors, whose sum is σ = 694349862. Its totient is φ = 694349860.

The previous prime is 694349833. The next prime is 694349867. The reversal of 694349861 is 168943496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531302500 + 163047361 = 23050^2 + 12769^2 .

It is a cyclic number.

It is not a de Polignac number, because 694349861 - 2¹⁴ = 694333477 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 (694349867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347174930 + 347174931.

It is an arithmetic number, because the mean of its divisors is an integer number (347174931).

Almost surely, 2^694349861 is an apocalyptic number.

It is an amenable number.

694349861 is a deficient number, since it is larger than the sum of its proper divisors (1).

694349861 is an equidigital number, since it uses as much as digits as its factorization.

694349861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 694349861 is about 26350.5191789460. The cubic root of 694349861 is about 885.5086018637.

The spelling of 694349861 in words is "six hundred ninety-four million, three hundred forty-nine thousand, eight hundred sixty-one".