697999 has 2 divisors, whose sum is σ = 698000. Its totient is φ = 697998.

The previous prime is 697993. The next prime is 698017. The reversal of 697999 is 999796.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 697999 - 2⁵ = 697967 is a prime.

697999 is a modest number, since divided by 999 gives 697 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348999 + 349000.

It is an arithmetic number, because the mean of its divisors is an integer number (349000).

2⁶⁹⁷⁹⁹⁹ is an apocalyptic number.

697999 is a deficient number, since it is larger than the sum of its proper divisors (1).

697999 is an equidigital number, since it uses as much as digits as its factorization.

697999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 49.

The square root of 697999 is about 835.4633444981. The cubic root of 697999 is about 88.7057148629.

The spelling of 697999 in words is "six hundred ninety-seven thousand, nine hundred ninety-nine".