1231233433 has 2 divisors, whose sum is σ = 1231233434. Its totient is φ = 1231233432.

The previous prime is 1231233431. The next prime is 1231233439. The reversal of 1231233433 is 3343321321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899520064 + 331713369 = 29992^2 + 18213^2 .

It is an emirp because it is prime and its reverse (3343321321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231233433 - 2¹ = 1231233431 is a prime.

Together with 1231233431, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1231233398 and 1231233407.

It is not a weakly prime, because it can be changed into another prime (1231233431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615616716 + 615616717.

It is an arithmetic number, because the mean of its divisors is an integer number (615616717).

Almost surely, 2^1231233433 is an apocalyptic number.

It is an amenable number.

1231233433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231233433 is an equidigital number, since it uses as much as digits as its factorization.

1231233433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 25.

The square root of 1231233433 is about 35088.9360482760. The cubic root of 1231233433 is about 1071.7992939507.

Adding to 1231233433 its reverse (3343321321), we get a palindrome (4574554754).

The spelling of 1231233433 in words is "one billion, two hundred thirty-one million, two hundred thirty-three thousand, four hundred thirty-three".