11613509 has 2 divisors, whose sum is σ = 11613510. Its totient is φ = 11613508.

The previous prime is 11613473. The next prime is 11613517. The reversal of 11613509 is 90531611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8282884 + 3330625 = 2878^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 11613509 - 2¹² = 11609413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11613409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5806754 + 5806755.

It is an arithmetic number, because the mean of its divisors is an integer number (5806755).

Almost surely, 2^11613509 is an apocalyptic number.

It is an amenable number.

11613509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11613509 is an equidigital number, since it uses as much as digits as its factorization.

11613509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 11613509 is about 3407.8598856174. The cubic root of 11613509 is about 226.4580796877.

The spelling of 11613509 in words is "eleven million, six hundred thirteen thousand, five hundred nine".