693934289 has 2 divisors, whose sum is σ = 693934290. Its totient is φ = 693934288.

The previous prime is 693934261. The next prime is 693934291. The reversal of 693934289 is 982439396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506025025 + 187909264 = 22495^2 + 13708^2 .

It is a cyclic number.

It is not a de Polignac number, because 693934289 - 2²⁸ = 425498833 is a prime.

It is a Sophie Germain prime.

Together with 693934291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 693934289.

It is not a weakly prime, because it can be changed into another prime (693934259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346967144 + 346967145.

It is an arithmetic number, because the mean of its divisors is an integer number (346967145).

Almost surely, 2^693934289 is an apocalyptic number.

It is an amenable number.

693934289 is a deficient number, since it is larger than the sum of its proper divisors (1).

693934289 is an equidigital number, since it uses as much as digits as its factorization.

693934289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 53.

The square root of 693934289 is about 26342.6325373908. The cubic root of 693934289 is about 885.3319061080.

The spelling of 693934289 in words is "six hundred ninety-three million, nine hundred thirty-four thousand, two hundred eighty-nine".