11601891 has 12 divisors (see below), whose sum is σ = 19152432. Its totient is φ = 6629616.

The previous prime is 11601853. The next prime is 11601901. The reversal of 11601891 is 19810611.

11601891 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 not a de Polignac number, because 11601891 - 2⁷ = 11601763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11601841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92016 + ... + 92141.

It is an arithmetic number, because the mean of its divisors is an integer number (1596036).

Almost surely, 2^11601891 is an apocalyptic number.

11601891 is a deficient number, since it is larger than the sum of its proper divisors (7550541).

11601891 is a wasteful number, since it uses less digits than its factorization.

11601891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184170 (or 184167 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 11601891 is about 3406.1548702312. The cubic root of 11601891 is about 226.3825392749.

The spelling of 11601891 in words is "eleven million, six hundred one thousand, eight hundred ninety-one".