1303040643 has 32 divisors (see below), whose sum is σ = 1857724416. Its totient is φ = 810514848.

The previous prime is 1303040623. The next prime is 1303040659. The reversal of 1303040643 is 3460403031.

It is not a de Polignac number, because 1303040643 - 2⁶ = 1303040579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1303040603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1436196 + ... + 1437102.

It is an arithmetic number, because the mean of its divisors is an integer number (58053888).

Almost surely, 2^1303040643 is an apocalyptic number.

1303040643 is a deficient number, since it is larger than the sum of its proper divisors (554683773).

1303040643 is a wasteful number, since it uses less digits than its factorization.

1303040643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1303040643 is about 36097.6542589681. The cubic root of 1303040643 is about 1092.2431272107.

Adding to 1303040643 its reverse (3460403031), we get a palindrome (4763443674).

The spelling of 1303040643 in words is "one billion, three hundred three million, forty thousand, six hundred forty-three".