11640617 has 4 divisors (see below), whose sum is σ = 11648196. Its totient is φ = 11633040.

The previous prime is 11640613. The next prime is 11640619. The reversal of 11640617 is 71604611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71604611 = 13 ⋅5508047.

It can be written as a sum of positive squares in 2 ways, for example, as 9265936 + 2374681 = 3044^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640617 - 2² = 11640613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11640611) 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, 578 + ... + 4859.

It is an arithmetic number, because the mean of its divisors is an integer number (2912049).

Almost surely, 2^11640617 is an apocalyptic number.

It is an amenable number.

11640617 is a deficient number, since it is larger than the sum of its proper divisors (7579).

11640617 is an equidigital number, since it uses as much as digits as its factorization.

11640617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 11640617 is about 3411.8348435996. The cubic root of 11640617 is about 226.6341406135.

The spelling of 11640617 in words is "eleven million, six hundred forty thousand, six hundred seventeen".