697656 has 32 divisors (see below), whose sum is σ = 1789200. Its totient is φ = 226560.

The previous prime is 697643. The next prime is 697673. The reversal of 697656 is 656796.

It is a happy number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697656.

It is an unprimeable number.

697656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630 + ... + 1338.

2⁶⁹⁷⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894600).

697656 is an abundant number, since it is smaller than the sum of its proper divisors (1091544).

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

697656 is a wasteful number, since it uses less digits than its factorization.

697656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 755 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 697656 is about 835.2580439601. The cubic root of 697656 is about 88.6911823467.

The spelling of 697656 in words is "six hundred ninety-seven thousand, six hundred fifty-six".