697686 has 36 divisors (see below), whose sum is σ = 1584828. Its totient is φ = 204600.

The previous prime is 697681. The next prime is 697687. The reversal of 697686 is 686796.

It is a happy number.

697686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697681) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22491 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (44023).

2⁶⁹⁷⁶⁸⁶ is an apocalyptic number.

697686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 697686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792414).

697686 is an abundant number, since it is smaller than the sum of its proper divisors (887142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697686 is a wasteful number, since it uses less digits than its factorization.

697686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 47 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 697686 is about 835.2760022891. The cubic root of 697686 is about 88.6924536023.

The spelling of 697686 in words is "six hundred ninety-seven thousand, six hundred eighty-six".