1313311403 has 2 divisors, whose sum is σ = 1313311404. Its totient is φ = 1313311402.

The previous prime is 1313311399. The next prime is 1313311409. The reversal of 1313311403 is 3041133131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313311403 - 2² = 1313311399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1313311409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656655701 + 656655702.

It is an arithmetic number, because the mean of its divisors is an integer number (656655702).

Almost surely, 2^1313311403 is an apocalyptic number.

1313311403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313311403 is an equidigital number, since it uses as much as digits as its factorization.

1313311403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1313311403 is about 36239.6385605596. The cubic root of 1313311403 is about 1095.1053610315.

Adding to 1313311403 its reverse (3041133131), we get a palindrome (4354444534).

The spelling of 1313311403 in words is "one billion, three hundred thirteen million, three hundred eleven thousand, four hundred three".