231923 has 2 divisors, whose sum is σ = 231924. Its totient is φ = 231922.

The previous prime is 231919. The next prime is 231943. The reversal of 231923 is 329132.

It is an a-pointer prime, because the next prime (231943) can be obtained adding 231923 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231923 - 2² = 231919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231895 and 231904.

It is not a weakly prime, because it can be changed into another prime (231943) 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 as a sum of consecutive naturals, namely, 115961 + 115962.

It is an arithmetic number, because the mean of its divisors is an integer number (115962).

2²³¹⁹²³ is an apocalyptic number.

231923 is a deficient number, since it is larger than the sum of its proper divisors (1).

231923 is an equidigital number, since it uses as much as digits as its factorization.

231923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 20.

The square root of 231923 is about 481.5838452440. The cubic root of 231923 is about 61.4395378191.

The spelling of 231923 in words is "two hundred thirty-one thousand, nine hundred twenty-three".