691796 has 24 divisors (see below), whose sum is σ = 1430016. Its totient is φ = 286560.

The previous prime is 691787. The next prime is 691799. The reversal of 691796 is 697196.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691799) by changing a digit.

691796 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, 470 + ... + 1266.

It is an arithmetic number, because the mean of its divisors is an integer number (59584).

2⁶⁹¹⁷⁹⁶ 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 691796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715008).

691796 is an abundant number, since it is smaller than the sum of its proper divisors (738220).

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

691796 is a wasteful number, since it uses less digits than its factorization.

691796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 691796 is about 831.7427486910. The cubic root of 691796 is about 88.4421616617.

The spelling of 691796 in words is "six hundred ninety-one thousand, seven hundred ninety-six".