231697 has 4 divisors (see below), whose sum is σ = 232960. Its totient is φ = 230436.

The previous prime is 231677. The next prime is 231701. The reversal of 231697 is 796132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231697 - 2¹⁵ = 198929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297 + ... + 742.

It is an arithmetic number, because the mean of its divisors is an integer number (58240).

2²³¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

231697 is a deficient number, since it is larger than the sum of its proper divisors (1263).

231697 is a wasteful number, since it uses less digits than its factorization.

231697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262.

The product of its digits is 2268, while the sum is 28.

The square root of 231697 is about 481.3491456313. The cubic root of 231697 is about 61.4195745149.

The spelling of 231697 in words is "two hundred thirty-one thousand, six hundred ninety-seven".