1313503403 has 2 divisors, whose sum is σ = 1313503404. Its totient is φ = 1313503402.

The previous prime is 1313503363. The next prime is 1313503427. The reversal of 1313503403 is 3043053131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3043053131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313503403 - 2⁶ = 1313503339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313503463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656751701 + 656751702.

It is an arithmetic number, because the mean of its divisors is an integer number (656751702).

Almost surely, 2^1313503403 is an apocalyptic number.

1313503403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313503403 is an equidigital number, since it uses as much as digits as its factorization.

1313503403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 1313503403 is about 36242.2874967903. The cubic root of 1313503403 is about 1095.1587248626.

Adding to 1313503403 its reverse (3043053131), we get a palindrome (4356556534).

The spelling of 1313503403 in words is "one billion, three hundred thirteen million, five hundred three thousand, four hundred three".