1313621503 has 2 divisors, whose sum is σ = 1313621504. Its totient is φ = 1313621502.

The previous prime is 1313621431. The next prime is 1313621537. The reversal of 1313621503 is 3051263131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313621503 - 2¹³ = 1313613311 is a prime.

It is a super-3 number, since 3×1313621503³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313621593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656810751 + 656810752.

It is an arithmetic number, because the mean of its divisors is an integer number (656810752).

Almost surely, 2^1313621503 is an apocalyptic number.

1313621503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313621503 is an equidigital number, since it uses as much as digits as its factorization.

1313621503 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 25.

The square root of 1313621503 is about 36243.9167723357. The cubic root of 1313621503 is about 1095.1915465944.

Adding to 1313621503 its reverse (3051263131), we get a palindrome (4364884634).

The spelling of 1313621503 in words is "one billion, three hundred thirteen million, six hundred twenty-one thousand, five hundred three".