694663513 has 2 divisors, whose sum is σ = 694663514. Its totient is φ = 694663512.

The previous prime is 694663499. The next prime is 694663517. The reversal of 694663513 is 315366496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680009929 + 14653584 = 26077^2 + 3828^2 .

It is a cyclic number.

It is not a de Polignac number, because 694663513 - 2²¹ = 692566361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 694663513.

It is not a weakly prime, because it can be changed into another prime (694663517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347331756 + 347331757.

It is an arithmetic number, because the mean of its divisors is an integer number (347331757).

Almost surely, 2^694663513 is an apocalyptic number.

It is an amenable number.

694663513 is a deficient number, since it is larger than the sum of its proper divisors (1).

694663513 is an equidigital number, since it uses as much as digits as its factorization.

694663513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 43.

The square root of 694663513 is about 26356.4700405802. The cubic root of 694663513 is about 885.6419158934.

The spelling of 694663513 in words is "six hundred ninety-four million, six hundred sixty-three thousand, five hundred thirteen".