11103509 has 2 divisors, whose sum is σ = 11103510. Its totient is φ = 11103508.

The previous prime is 11103481. The next prime is 11103527. The reversal of 11103509 is 90530111.

11103509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8868484 + 2235025 = 2978^2 + 1495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11103509 is a prime.

It is a super-2 number, since 2×11103509² = 246575824226162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11103539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551754 + 5551755.

It is an arithmetic number, because the mean of its divisors is an integer number (5551755).

Almost surely, 2^11103509 is an apocalyptic number.

It is an amenable number.

11103509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103509 is an equidigital number, since it uses as much as digits as its factorization.

11103509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 11103509 is about 3332.1928215516. The cubic root of 11103509 is about 223.0934140466.

The spelling of 11103509 in words is "eleven million, one hundred three thousand, five hundred nine".