231693 has 32 divisors (see below), whose sum is σ = 414720. Its totient is φ = 111360.

The previous prime is 231677. The next prime is 231701. The reversal of 231693 is 396132.

It is not a de Polignac number, because 231693 - 2⁴ = 231677 is a prime.

231693 is a modest number, since divided by 693 gives 231 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3898 + ... + 3956.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2²³¹⁶⁹³ is an apocalyptic number.

It is an amenable number.

231693 is a deficient number, since it is larger than the sum of its proper divisors (183027).

231693 is a wasteful number, since it uses less digits than its factorization.

231693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97.

The product of its digits is 972, while the sum is 24.

The square root of 231693 is about 481.3449906252. The cubic root of 231693 is about 61.4192210652.

The spelling of 231693 in words is "two hundred thirty-one thousand, six hundred ninety-three".