1340043233 has 4 divisors (see below), whose sum is σ = 1341554880. Its totient is φ = 1338531588.

The previous prime is 1340043163. The next prime is 1340043247. The reversal of 1340043233 is 3323400431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1340043233 - 2¹⁸ = 1339781089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340043199 and 1340043208.

It is not an unprimeable number, because it can be changed into a prime (1340043253) 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, 754493 + ... + 756266.

It is an arithmetic number, because the mean of its divisors is an integer number (335388720).

Almost surely, 2^1340043233 is an apocalyptic number.

It is an amenable number.

1340043233 is a deficient number, since it is larger than the sum of its proper divisors (1511647).

1340043233 is an equidigital number, since it uses as much as digits as its factorization.

1340043233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511646.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 1340043233 is about 36606.6009484628. The cubic root of 1340043233 is about 1102.4856278517.

Adding to 1340043233 its reverse (3323400431), we get a palindrome (4663443664).

The spelling of 1340043233 in words is "one billion, three hundred forty million, forty-three thousand, two hundred thirty-three".