691359 has 4 divisors (see below), whose sum is σ = 921816. Its totient is φ = 460904.

The previous prime is 691349. The next prime is 691363. The reversal of 691359 is 953196.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 691359 - 2⁴ = 691343 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691359.

It is not an unprimeable number, because it can be changed into a prime (691309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115224 + ... + 115229.

It is an arithmetic number, because the mean of its divisors is an integer number (230454).

2⁶⁹¹³⁵⁹ is an apocalyptic number.

691359 is a deficient number, since it is larger than the sum of its proper divisors (230457).

691359 is a wasteful number, since it uses less digits than its factorization.

691359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230456.

The product of its digits is 7290, while the sum is 33.

The square root of 691359 is about 831.4800057728. The cubic root of 691359 is about 88.4235350889.

The spelling of 691359 in words is "six hundred ninety-one thousand, three hundred fifty-nine".