697687 has 2 divisors, whose sum is σ = 697688. Its totient is φ = 697686.

The previous prime is 697681. The next prime is 697691. The reversal of 697687 is 786796.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697687 is a prime.

It is a super-3 number, since 3×697687³ = 1018833337681265109, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697681) 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, 348843 + 348844.

It is an arithmetic number, because the mean of its divisors is an integer number (348844).

2⁶⁹⁷⁶⁸⁷ is an apocalyptic number.

697687 is a deficient number, since it is larger than the sum of its proper divisors (1).

697687 is an equidigital number, since it uses as much as digits as its factorization.

697687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 697687 is about 835.2766008934. The cubic root of 697687 is about 88.6924959768.

The spelling of 697687 in words is "six hundred ninety-seven thousand, six hundred eighty-seven".