691716 has 24 divisors (see below), whose sum is σ = 1643040. Its totient is φ = 226432.

The previous prime is 691709. The next prime is 691721. The reversal of 691716 is 617196.

It is an unprimeable number.

691716 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (68460).

2⁶⁹¹⁷¹⁶ is an apocalyptic number.

It is an amenable number.

691716 is an abundant number, since it is smaller than the sum of its proper divisors (951324).

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

691716 is a wasteful number, since it uses less digits than its factorization.

691716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1041 counting only the distinct ones).

The product of its digits is 2268, while the sum is 30.

The square root of 691716 is about 831.6946555077. The cubic root of 691716 is about 88.4387523494.

The spelling of 691716 in words is "six hundred ninety-one thousand, seven hundred sixteen".