1340605463 has 2 divisors, whose sum is σ = 1340605464. Its totient is φ = 1340605462.

The previous prime is 1340605433. The next prime is 1340605471. The reversal of 1340605463 is 3645060431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340605463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340605433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670302731 + 670302732.

It is an arithmetic number, because the mean of its divisors is an integer number (670302732).

Almost surely, 2^1340605463 is an apocalyptic number.

1340605463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340605463 is an equidigital number, since it uses as much as digits as its factorization.

1340605463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1340605463 is about 36614.2794958470. The cubic root of 1340605463 is about 1102.6397929839.

Adding to 1340605463 its reverse (3645060431), we get a palindrome (4985665894).

The spelling of 1340605463 in words is "one billion, three hundred forty million, six hundred five thousand, four hundred sixty-three".