11503313 has 2 divisors, whose sum is σ = 11503314. Its totient is φ = 11503312.

The previous prime is 11503307. The next prime is 11503351. The reversal of 11503313 is 31330511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7059649 + 4443664 = 2657^2 + 2108^2 .

It is an emirp because it is prime and its reverse (31330511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11503313 - 2⁸ = 11503057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11503291 and 11503300.

It is not a weakly prime, because it can be changed into another prime (11503363) 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 as a sum of consecutive naturals, namely, 5751656 + 5751657.

It is an arithmetic number, because the mean of its divisors is an integer number (5751657).

Almost surely, 2^11503313 is an apocalyptic number.

It is an amenable number.

11503313 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503313 is an equidigital number, since it uses as much as digits as its factorization.

11503313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 11503313 is about 3391.6534315876. The cubic root of 11503313 is about 225.7395451508.

Adding to 11503313 its reverse (31330511), we get a palindrome (42833824).

The spelling of 11503313 in words is "eleven million, five hundred three thousand, three hundred thirteen".