11776891 has 4 divisors (see below), whose sum is σ = 13459312. Its totient is φ = 10094472.

The previous prime is 11776889. The next prime is 11776907. The reversal of 11776891 is 19867711.

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 11776891 - 2¹ = 11776889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11776861) 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, 841200 + ... + 841213.

It is an arithmetic number, because the mean of its divisors is an integer number (3364828).

Almost surely, 2^11776891 is an apocalyptic number.

11776891 is a deficient number, since it is larger than the sum of its proper divisors (1682421).

11776891 is an equidigital number, since it uses as much as digits as its factorization.

11776891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682420.

The product of its digits is 21168, while the sum is 40.

The square root of 11776891 is about 3431.7475140226. The cubic root of 11776891 is about 227.5150962087.

The spelling of 11776891 in words is "eleven million, seven hundred seventy-six thousand, eight hundred ninety-one".