694445993 has 2 divisors, whose sum is σ = 694445994. Its totient is φ = 694445992.

The previous prime is 694445981. The next prime is 694446023. The reversal of 694445993 is 399544496.

694445993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680844649 + 13601344 = 26093^2 + 3688^2 .

It is a cyclic number.

It is not a de Polignac number, because 694445993 - 2¹⁸ = 694183849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (694445963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347222996 + 347222997.

It is an arithmetic number, because the mean of its divisors is an integer number (347222997).

Almost surely, 2^694445993 is an apocalyptic number.

It is an amenable number.

694445993 is a deficient number, since it is larger than the sum of its proper divisors (1).

694445993 is an equidigital number, since it uses as much as digits as its factorization.

694445993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 53.

The square root of 694445993 is about 26352.3432164959. The cubic root of 694445993 is about 885.5494658860.

The spelling of 694445993 in words is "six hundred ninety-four million, four hundred forty-five thousand, nine hundred ninety-three".