231209923 has 8 divisors (see below), whose sum is σ = 264388448. Its totient is φ = 198068544.

The previous prime is 231209921. The next prime is 231209933. The reversal of 231209923 is 329902132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231209923 - 2¹ = 231209921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231209921) 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 7 ways as a sum of consecutive naturals, for example, 5665 + ... + 22237.

It is an arithmetic number, because the mean of its divisors is an integer number (33048556).

Almost surely, 2^231209923 is an apocalyptic number.

231209923 is a deficient number, since it is larger than the sum of its proper divisors (33178525).

231209923 is a wasteful number, since it uses less digits than its factorization.

231209923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18573.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 231209923 is about 15205.5885450054. The cubic root of 231209923 is about 613.7650526213.

The spelling of 231209923 in words is "two hundred thirty-one million, two hundred nine thousand, nine hundred twenty-three".