691353 has 24 divisors (see below), whose sum is σ = 1135680. Its totient is φ = 401760.

The previous prime is 691349. The next prime is 691363. The reversal of 691353 is 353196.

It is not a de Polignac number, because 691353 - 2² = 691349 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691353.

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 23 ways as a sum of consecutive naturals, for example, 2068 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (47320).

2⁶⁹¹³⁵³ is an apocalyptic number.

It is an amenable number.

691353 is a deficient number, since it is larger than the sum of its proper divisors (444327).

691353 is a wasteful number, since it uses less digits than its factorization.

691353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 346 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 691353 is about 831.4763977408. The cubic root of 691353 is about 88.4232792919.

The spelling of 691353 in words is "six hundred ninety-one thousand, three hundred fifty-three".