11509369 has 2 divisors, whose sum is σ = 11509370. Its totient is φ = 11509368.

The previous prime is 11509367. The next prime is 11509373. The reversal of 11509369 is 96390511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 619369 = 3300^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 11509369 - 2¹ = 11509367 is a prime.

It is a super-2 number, since 2×11509369² = 264931149556322, which contains 22 as substring.

Together with 11509367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11509367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5754684 + 5754685.

It is an arithmetic number, because the mean of its divisors is an integer number (5754685).

Almost surely, 2^11509369 is an apocalyptic number.

It is an amenable number.

11509369 is a deficient number, since it is larger than the sum of its proper divisors (1).

11509369 is an equidigital number, since it uses as much as digits as its factorization.

11509369 is an evil number, because the sum of its binary digits is even.

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

The square root of 11509369 is about 3392.5460940126. The cubic root of 11509369 is about 225.7791522580.

The spelling of 11509369 in words is "eleven million, five hundred nine thousand, three hundred sixty-nine".