694838563 has 2 divisors, whose sum is σ = 694838564. Its totient is φ = 694838562.

The previous prime is 694838527. The next prime is 694838581. The reversal of 694838563 is 365838496.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 694838563 - 2²¹ = 692741411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 694838563.

It is not a weakly prime, because it can be changed into another prime (694838593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347419281 + 347419282.

It is an arithmetic number, because the mean of its divisors is an integer number (347419282).

Almost surely, 2^694838563 is an apocalyptic number.

694838563 is a deficient number, since it is larger than the sum of its proper divisors (1).

694838563 is an equidigital number, since it uses as much as digits as its factorization.

694838563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The square root of 694838563 is about 26359.7906478788. The cubic root of 694838563 is about 885.7163013544.

The spelling of 694838563 in words is "six hundred ninety-four million, eight hundred thirty-eight thousand, five hundred sixty-three".