11513661 has 8 divisors (see below), whose sum is σ = 15726144. Its totient is φ = 7488480.

The previous prime is 11513659. The next prime is 11513687. The reversal of 11513661 is 16631511.

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

It is not a de Polignac number, because 11513661 - 2¹ = 11513659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46681 + ... + 46926.

It is an arithmetic number, because the mean of its divisors is an integer number (1965768).

Almost surely, 2^11513661 is an apocalyptic number.

It is an amenable number.

11513661 is a deficient number, since it is larger than the sum of its proper divisors (4212483).

11513661 is an equidigital number, since it uses as much as digits as its factorization.

11513661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93651.

The product of its digits is 540, while the sum is 24.

The square root of 11513661 is about 3393.1785983057. The cubic root of 11513661 is about 225.8072141407.

The spelling of 11513661 in words is "eleven million, five hundred thirteen thousand, six hundred sixty-one".