1313265403 has 2 divisors, whose sum is σ = 1313265404. Its totient is φ = 1313265402.

The previous prime is 1313265397. The next prime is 1313265407. The reversal of 1313265403 is 3045623131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313265403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313265407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656632701 + 656632702.

It is an arithmetic number, because the mean of its divisors is an integer number (656632702).

Almost surely, 2^1313265403 is an apocalyptic number.

1313265403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313265403 is an equidigital number, since it uses as much as digits as its factorization.

1313265403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1313265403 is about 36239.0038908356. The cubic root of 1313265403 is about 1095.0925751746.

Adding to 1313265403 its reverse (3045623131), we get a palindrome (4358888534).

The spelling of 1313265403 in words is "one billion, three hundred thirteen million, two hundred sixty-five thousand, four hundred three".