694758641 has 2 divisors, whose sum is σ = 694758642. Its totient is φ = 694758640.

The previous prime is 694758629. The next prime is 694758667. The reversal of 694758641 is 146857496.

694758641 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., 601230400 + 93528241 = 24520^2 + 9671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-694758641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 694758641.

It is not a weakly prime, because it can be changed into another prime (694758671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347379320 + 347379321.

It is an arithmetic number, because the mean of its divisors is an integer number (347379321).

Almost surely, 2^694758641 is an apocalyptic number.

It is an amenable number.

694758641 is a deficient number, since it is larger than the sum of its proper divisors (1).

694758641 is an equidigital number, since it uses as much as digits as its factorization.

694758641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 694758641 is about 26358.2746210749. The cubic root of 694758641 is about 885.6823409803.

The spelling of 694758641 in words is "six hundred ninety-four million, seven hundred fifty-eight thousand, six hundred forty-one".