1440344123 has 2 divisors, whose sum is σ = 1440344124. Its totient is φ = 1440344122.

The previous prime is 1440344107. The next prime is 1440344137. The reversal of 1440344123 is 3214430441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1440344123 - 2⁴ = 1440344107 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440344092 and 1440344101.

It is not a weakly prime, because it can be changed into another prime (1440346123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720172061 + 720172062.

It is an arithmetic number, because the mean of its divisors is an integer number (720172062).

Almost surely, 2^1440344123 is an apocalyptic number.

1440344123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440344123 is an equidigital number, since it uses as much as digits as its factorization.

1440344123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1440344123 is about 37951.8658698094. The cubic root of 1440344123 is about 1129.3331808653. Note that the first 3 decimals are identical.

Adding to 1440344123 its reverse (3214430441), we get a palindrome (4654774564).

The spelling of 1440344123 in words is "one billion, four hundred forty million, three hundred forty-four thousand, one hundred twenty-three".