11787643 has 4 divisors (see below), whose sum is σ = 13471600. Its totient is φ = 10103688.

The previous prime is 11787637. The next prime is 11787649. The reversal of 11787643 is 34678711.

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

It is an interprime number because it is at equal distance from previous prime (11787637) and next prime (11787649).

It is not a de Polignac number, because 11787643 - 2²¹ = 9690491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11787649) 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 3 ways as a sum of consecutive naturals, for example, 841968 + ... + 841981.

It is an arithmetic number, because the mean of its divisors is an integer number (3367900).

Almost surely, 2^11787643 is an apocalyptic number.

11787643 is a deficient number, since it is larger than the sum of its proper divisors (1683957).

11787643 is an equidigital number, since it uses as much as digits as its factorization.

11787643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683956.

The product of its digits is 28224, while the sum is 37.

The square root of 11787643 is about 3433.3137054455. The cubic root of 11787643 is about 227.5843136346.

The spelling of 11787643 in words is "eleven million, seven hundred eighty-seven thousand, six hundred forty-three".