1233423451 has 4 divisors (see below), whose sum is σ = 1328302192. Its totient is φ = 1138544712.

The previous prime is 1233423427. The next prime is 1233423463. The reversal of 1233423451 is 1543243321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1543243321 = 41 ⋅37640081.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233423451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233420451) 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 in 3 ways as a sum of consecutive naturals, for example, 47439351 + ... + 47439376.

It is an arithmetic number, because the mean of its divisors is an integer number (332075548).

Almost surely, 2^1233423451 is an apocalyptic number.

1233423451 is a deficient number, since it is larger than the sum of its proper divisors (94878741).

1233423451 is an equidigital number, since it uses as much as digits as its factorization.

1233423451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94878740.

The product of its digits is 8640, while the sum is 28.

The square root of 1233423451 is about 35120.1288579641. The cubic root of 1233423451 is about 1072.4343940467.

Adding to 1233423451 its reverse (1543243321), we get a palindrome (2776666772).

The spelling of 1233423451 in words is "one billion, two hundred thirty-three million, four hundred twenty-three thousand, four hundred fifty-one".