11639443 has 4 divisors (see below), whose sum is σ = 11723320. Its totient is φ = 11555568.

The previous prime is 11639437. The next prime is 11639479. The reversal of 11639443 is 34493611.

11639443 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34493611 = 43 ⋅802177.

It is a cyclic number.

It is not a de Polignac number, because 11639443 - 2¹³ = 11631251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11639413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41730 + ... + 42007.

It is an arithmetic number, because the mean of its divisors is an integer number (2930830).

Almost surely, 2^11639443 is an apocalyptic number.

11639443 is a deficient number, since it is larger than the sum of its proper divisors (83877).

11639443 is an equidigital number, since it uses as much as digits as its factorization.

11639443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83876.

The product of its digits is 7776, while the sum is 31.

The square root of 11639443 is about 3411.6627910742. The cubic root of 11639443 is about 226.6265213889.

The spelling of 11639443 in words is "eleven million, six hundred thirty-nine thousand, four hundred forty-three".