1340440103 has 2 divisors, whose sum is σ = 1340440104. Its totient is φ = 1340440102.

The previous prime is 1340440061. The next prime is 1340440111. The reversal of 1340440103 is 3010440431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340440103 - 2¹² = 1340436007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340440603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670220051 + 670220052.

It is an arithmetic number, because the mean of its divisors is an integer number (670220052).

Almost surely, 2^1340440103 is an apocalyptic number.

1340440103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340440103 is an equidigital number, since it uses as much as digits as its factorization.

1340440103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1340440103 is about 36612.0212908274. The cubic root of 1340440103 is about 1102.5944552569.

Adding to 1340440103 its reverse (3010440431), we get a palindrome (4350880534).

The spelling of 1340440103 in words is "one billion, three hundred forty million, four hundred forty thousand, one hundred three".