697860017 has 2 divisors, whose sum is σ = 697860018. Its totient is φ = 697860016.

The previous prime is 697859993. The next prime is 697860019. The reversal of 697860017 is 710068796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402845041 + 295014976 = 20071^2 + 17176^2 .

It is a cyclic number.

It is not a de Polignac number, because 697860017 - 2²⁸ = 429424561 is a prime.

Together with 697860019, it forms a pair of twin primes.

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 697860017.

It is not a weakly prime, because it can be changed into another prime (697860019) 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, 348930008 + 348930009.

It is an arithmetic number, because the mean of its divisors is an integer number (348930009).

Almost surely, 2^697860017 is an apocalyptic number.

It is an amenable number.

697860017 is a deficient number, since it is larger than the sum of its proper divisors (1).

697860017 is an equidigital number, since it uses as much as digits as its factorization.

697860017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 697860017 is about 26417.0402770636. The cubic root of 697860017 is about 886.9982688659.

The spelling of 697860017 in words is "six hundred ninety-seven million, eight hundred sixty thousand, seventeen".