691317 has 12 divisors (see below), whose sum is σ = 1089504. Its totient is φ = 418920.

The previous prime is 691309. The next prime is 691333. The reversal of 691317 is 713196.

691317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 691317 - 2³ = 691309 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3393 + ... + 3590.

It is an arithmetic number, because the mean of its divisors is an integer number (90792).

2⁶⁹¹³¹⁷ is an apocalyptic number.

It is an amenable number.

691317 is a deficient number, since it is larger than the sum of its proper divisors (398187).

691317 is a wasteful number, since it uses less digits than its factorization.

691317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000 (or 6997 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 691317 is about 831.4547492197. The cubic root of 691317 is about 88.4217444786.

The spelling of 691317 in words is "six hundred ninety-one thousand, three hundred seventeen".