689797 has 2 divisors, whose sum is σ = 689798. Its totient is φ = 689796.

The previous prime is 689789. The next prime is 689803. The reversal of 689797 is 797986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586756 + 103041 = 766^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 689797 - 2³ = 689789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344898 + 344899.

It is an arithmetic number, because the mean of its divisors is an integer number (344899).

2⁶⁸⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

689797 is a deficient number, since it is larger than the sum of its proper divisors (1).

689797 is an equidigital number, since it uses as much as digits as its factorization.

689797 is an evil number, because the sum of its binary digits is even.

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

The square root of 689797 is about 830.5401856623. The cubic root of 689797 is about 88.3568925728.

It can be divided in two parts, 68979 and 7, that added together give a palindrome (68986).

The spelling of 689797 in words is "six hundred eighty-nine thousand, seven hundred ninety-seven".