691493 has 8 divisors (see below), whose sum is σ = 775200. Its totient is φ = 611280.

The previous prime is 691489. The next prime is 691499. The reversal of 691493 is 394196.

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 691493 - 2² = 691489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691499) 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, 443 + ... + 1256.

It is an arithmetic number, because the mean of its divisors is an integer number (96900).

2⁶⁹¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

691493 is a deficient number, since it is larger than the sum of its proper divisors (83707).

691493 is a wasteful number, since it uses less digits than its factorization.

691493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747.

The product of its digits is 5832, while the sum is 32.

The square root of 691493 is about 831.5605810763. The cubic root of 691493 is about 88.4292475037.

It can be divided in two parts, 6914 and 93, that added together give a palindrome (7007).

The spelling of 691493 in words is "six hundred ninety-one thousand, four hundred ninety-three".