231685873 has 4 divisors (see below), whose sum is σ = 231720048. Its totient is φ = 231651700.

The previous prime is 231685871. The next prime is 231685903. The reversal of 231685873 is 378586132.

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 231685873 - 2¹ = 231685871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231685871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3103 + ... + 21748.

It is an arithmetic number, because the mean of its divisors is an integer number (57930012).

Almost surely, 2^231685873 is an apocalyptic number.

It is an amenable number.

231685873 is a deficient number, since it is larger than the sum of its proper divisors (34175).

231685873 is an equidigital number, since it uses as much as digits as its factorization.

231685873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34174.

The product of its digits is 241920, while the sum is 43.

The square root of 231685873 is about 15221.2309948966. The cubic root of 231685873 is about 614.1859129605.

The spelling of 231685873 in words is "two hundred thirty-one million, six hundred eighty-five thousand, eight hundred seventy-three".