691313 has 8 divisors (see below), whose sum is σ = 803520. Its totient is φ = 582480.

The previous prime is 691309. The next prime is 691333. The reversal of 691313 is 313196.

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

It is a cyclic number.

It is not a de Polignac number, because 691313 - 2² = 691309 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691313.

It is not an unprimeable number, because it can be changed into a prime (691333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

2⁶⁹¹³¹³ is an apocalyptic number.

It is an amenable number.

691313 is a deficient number, since it is larger than the sum of its proper divisors (112207).

691313 is a wasteful number, since it uses less digits than its factorization.

691313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 486, while the sum is 23.

The square root of 691313 is about 831.4523437937. The cubic root of 691313 is about 88.4215739405.

It can be divided in two parts, 6 and 91313, that added together give a palindrome (91319).

The spelling of 691313 in words is "six hundred ninety-one thousand, three hundred thirteen".