11609491 has 8 divisors (see below), whose sum is σ = 11883024. Its totient is φ = 11338080.

The previous prime is 11609473. The next prime is 11609497. The reversal of 11609491 is 19490611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11609491 - 2⁹ = 11608979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11609497) 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 in 7 ways as a sum of consecutive naturals, for example, 16456 + ... + 17146.

It is an arithmetic number, because the mean of its divisors is an integer number (1485378).

Almost surely, 2^11609491 is an apocalyptic number.

11609491 is a deficient number, since it is larger than the sum of its proper divisors (273533).

11609491 is an equidigital number, since it uses as much as digits as its factorization.

11609491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11609491 is about 3407.2703150763. The cubic root of 11609491 is about 226.4319602918.

It can be divided in two parts, 11609 and 491, that added together give a square (12100 = 110²).

The spelling of 11609491 in words is "eleven million, six hundred nine thousand, four hundred ninety-one".