11509963 has 2 divisors, whose sum is σ = 11509964. Its totient is φ = 11509962.

The previous prime is 11509943. The next prime is 11509973. The reversal of 11509963 is 36990511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11509963 - 2⁵ = 11509931 is a prime.

It is a super-2 number, since 2×11509963² = 264958496522738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11509933) 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, 5754981 + 5754982.

It is an arithmetic number, because the mean of its divisors is an integer number (5754982).

Almost surely, 2^11509963 is an apocalyptic number.

11509963 is a deficient number, since it is larger than the sum of its proper divisors (1).

11509963 is an equidigital number, since it uses as much as digits as its factorization.

11509963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 11509963 is about 3392.6336377511. The cubic root of 11509963 is about 225.7830363548.

The spelling of 11509963 in words is "eleven million, five hundred nine thousand, nine hundred sixty-three".