1330540643 has 2 divisors, whose sum is σ = 1330540644. Its totient is φ = 1330540642.

The previous prime is 1330540621. The next prime is 1330540663. The reversal of 1330540643 is 3460450331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1330540643 - 2⁶ = 1330540579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1330540663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665270321 + 665270322.

It is an arithmetic number, because the mean of its divisors is an integer number (665270322).

Almost surely, 2^1330540643 is an apocalyptic number.

1330540643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330540643 is an equidigital number, since it uses as much as digits as its factorization.

1330540643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 1330540643 is about 36476.5766348763. The cubic root of 1330540643 is about 1099.8734408113.

Adding to 1330540643 its reverse (3460450331), we get a palindrome (4790990974).

The spelling of 1330540643 in words is "one billion, three hundred thirty million, five hundred forty thousand, six hundred forty-three".