697897 has 2 divisors, whose sum is σ = 697898. Its totient is φ = 697896.

The previous prime is 697891. The next prime is 697909. The reversal of 697897 is 798796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 32041 = 816^2 + 179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697897 is a prime.

It is a Chen prime.

697897 is a lucky number.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (697891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348948 + 348949.

It is an arithmetic number, because the mean of its divisors is an integer number (348949).

2⁶⁹⁷⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

697897 is a deficient number, since it is larger than the sum of its proper divisors (1).

697897 is an equidigital number, since it uses as much as digits as its factorization.

697897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 697897 is about 835.4022982971. The cubic root of 697897 is about 88.7013937375.

It can be divided in two parts, 69789 and 7, that added together give a palindrome (69796).

The spelling of 697897 in words is "six hundred ninety-seven thousand, eight hundred ninety-seven".