1340442223 has 4 divisors (see below), whose sum is σ = 1342849320. Its totient is φ = 1338035128.

The previous prime is 1340442211. The next prime is 1340442227. The reversal of 1340442223 is 3222440431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1340442223 - 2²⁹ = 803571311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340442227) 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 3 ways as a sum of consecutive naturals, for example, 1202713 + ... + 1203826.

It is an arithmetic number, because the mean of its divisors is an integer number (335712330).

Almost surely, 2^1340442223 is an apocalyptic number.

1340442223 is a deficient number, since it is larger than the sum of its proper divisors (2407097).

1340442223 is an equidigital number, since it uses as much as digits as its factorization.

1340442223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407096.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1340442223 is about 36612.0502430552. The cubic root of 1340442223 is about 1102.5950365334.

Adding to 1340442223 its reverse (3222440431), we get a palindrome (4562882654).

The spelling of 1340442223 in words is "one billion, three hundred forty million, four hundred forty-two thousand, two hundred twenty-three".