11609081 has 4 divisors (see below), whose sum is σ = 12664464. Its totient is φ = 10553700.

The previous prime is 11609069. The next prime is 11609107. The reversal of 11609081 is 18090611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11609081 - 2¹⁰ = 11608057 is a prime.

It is a super-2 number, since 2×11609081² = 269541523329122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11609081.

It is not an unprimeable number, because it can be changed into a prime (11609021) 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 in 3 ways as a sum of consecutive naturals, for example, 527675 + ... + 527696.

It is an arithmetic number, because the mean of its divisors is an integer number (3166116).

Almost surely, 2^11609081 is an apocalyptic number.

11609081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11609081 is a deficient number, since it is larger than the sum of its proper divisors (1055383).

11609081 is a wasteful number, since it uses less digits than its factorization.

11609081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055382.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 11609081 is about 3407.2101490809. The cubic root of 11609081 is about 226.4292947085.

Adding to 11609081 its reverse (18090611), we get a palindrome (29699692).

The spelling of 11609081 in words is "eleven million, six hundred nine thousand, eighty-one".