693491 has 4 divisors (see below), whose sum is σ = 712272. Its totient is φ = 674712.

The previous prime is 693487. The next prime is 693493. The reversal of 693491 is 194396.

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 693491 - 2² = 693487 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 693491.

It is not an unprimeable number, because it can be changed into a prime (693493) 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, 9335 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (178068).

2⁶⁹³⁴⁹¹ is an apocalyptic number.

693491 is a deficient number, since it is larger than the sum of its proper divisors (18781).

693491 is a wasteful number, since it uses less digits than its factorization.

693491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18780.

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

The square root of 693491 is about 832.7610701756. The cubic root of 693491 is about 88.5143347672.

The spelling of 693491 in words is "six hundred ninety-three thousand, four hundred ninety-one".