11639617 has 4 divisors (see below), whose sum is σ = 12697776. Its totient is φ = 10581460.

The previous prime is 11639603. The next prime is 11639659. The reversal of 11639617 is 71693611.

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 11639617 - 2¹⁵ = 11606849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11639417) 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 3 ways as a sum of consecutive naturals, for example, 529063 + ... + 529084.

It is an arithmetic number, because the mean of its divisors is an integer number (3174444).

Almost surely, 2^11639617 is an apocalyptic number.

It is an amenable number.

11639617 is a deficient number, since it is larger than the sum of its proper divisors (1058159).

11639617 is a wasteful number, since it uses less digits than its factorization.

11639617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058158.

The product of its digits is 6804, while the sum is 34.

The square root of 11639617 is about 3411.6882917406. The cubic root of 11639617 is about 226.6276506760.

The spelling of 11639617 in words is "eleven million, six hundred thirty-nine thousand, six hundred seventeen".