1303261313 has 4 divisors (see below), whose sum is σ = 1304490708. Its totient is φ = 1302031920.

The previous prime is 1303261273. The next prime is 1303261321. The reversal of 1303261313 is 3131623031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131623031 = 53 ⋅59087227.

It can be written as a sum of positive squares in 2 ways, for example, as 885181504 + 418079809 = 29752^2 + 20447^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303261313 - 2¹² = 1303257217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1303261373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613106 + ... + 615227.

It is an arithmetic number, because the mean of its divisors is an integer number (326122677).

Almost surely, 2^1303261313 is an apocalyptic number.

It is an amenable number.

1303261313 is a deficient number, since it is larger than the sum of its proper divisors (1229395).

1303261313 is a wasteful number, since it uses less digits than its factorization.

1303261313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229394.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1303261313 is about 36100.7106993754. The cubic root of 1303261313 is about 1092.3047808738.

Adding to 1303261313 its reverse (3131623031), we get a palindrome (4434884344).

The spelling of 1303261313 in words is "one billion, three hundred three million, two hundred sixty-one thousand, three hundred thirteen".