691914 has 8 divisors (see below), whose sum is σ = 1383840. Its totient is φ = 230636.

The previous prime is 691907. The next prime is 691919. The reversal of 691914 is 419196.

691914 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

691914 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (691919) by changing a digit.

691914 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57654 + ... + 57665.

It is an arithmetic number, because the mean of its divisors is an integer number (172980).

2⁶⁹¹⁹¹⁴ is an apocalyptic number.

691914 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

691914 is a wasteful number, since it uses less digits than its factorization.

691914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115324.

The product of its digits is 1944, while the sum is 30.

The square root of 691914 is about 831.8136810608. The cubic root of 691914 is about 88.4471899175.

The spelling of 691914 in words is "six hundred ninety-one thousand, nine hundred fourteen".