11443643 has 4 divisors (see below), whose sum is σ = 12045960. Its totient is φ = 10841328.

The previous prime is 11443637. The next prime is 11443697. The reversal of 11443643 is 34634411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11443643 - 2²² = 7249339 is a prime.

It is a super-2 number, since 2×11443643² = 261913930222898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11443613) 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, 301130 + ... + 301167.

It is an arithmetic number, because the mean of its divisors is an integer number (3011490).

Almost surely, 2^11443643 is an apocalyptic number.

11443643 is a deficient number, since it is larger than the sum of its proper divisors (602317).

11443643 is an equidigital number, since it uses as much as digits as its factorization.

11443643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602316.

The product of its digits is 3456, while the sum is 26.

The square root of 11443643 is about 3382.8453999555. The cubic root of 11443643 is about 225.3485494920.

The spelling of 11443643 in words is "eleven million, four hundred forty-three thousand, six hundred forty-three".