231823393 has 4 divisors (see below), whose sum is σ = 232685460. Its totient is φ = 230961328.

The previous prime is 231823391. The next prime is 231823421. The reversal of 231823393 is 393328132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 201441249 = 5512^2 + 14193^2 .

It is a cyclic number.

It is not a de Polignac number, because 231823393 - 2¹ = 231823391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231823391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430630 + ... + 431167.

It is an arithmetic number, because the mean of its divisors is an integer number (58171365).

Almost surely, 2^231823393 is an apocalyptic number.

It is an amenable number.

231823393 is a deficient number, since it is larger than the sum of its proper divisors (862067).

231823393 is an equidigital number, since it uses as much as digits as its factorization.

231823393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862066.

The product of its digits is 23328, while the sum is 34.

The square root of 231823393 is about 15225.7476992100. The cubic root of 231823393 is about 614.3074081267.

The spelling of 231823393 in words is "two hundred thirty-one million, eight hundred twenty-three thousand, three hundred ninety-three".