697985671 has 2 divisors, whose sum is σ = 697985672. Its totient is φ = 697985670.

The previous prime is 697985647. The next prime is 697985689. The reversal of 697985671 is 176589796.

697985671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 697985671 - 2¹¹ = 697983623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697985611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348992835 + 348992836.

It is an arithmetic number, because the mean of its divisors is an integer number (348992836).

Almost surely, 2^697985671 is an apocalyptic number.

697985671 is a deficient number, since it is larger than the sum of its proper divisors (1).

697985671 is an equidigital number, since it uses as much as digits as its factorization.

697985671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 58.

The square root of 697985671 is about 26419.4184455298. The cubic root of 697985671 is about 887.0515021739.

The spelling of 697985671 in words is "six hundred ninety-seven million, nine hundred eighty-five thousand, six hundred seventy-one".