11061891 has 12 divisors (see below), whose sum is σ = 16134768. Its totient is φ = 7302384.

The previous prime is 11061887. The next prime is 11061931. The reversal of 11061891 is 19816011.

It is not a de Polignac number, because 11061891 - 2² = 11061887 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11061811) 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, 5040 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (1344564).

Almost surely, 2^11061891 is an apocalyptic number.

11061891 is a deficient number, since it is larger than the sum of its proper divisors (5072877).

11061891 is a wasteful number, since it uses less digits than its factorization.

11061891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12042 (or 12039 counting only the distinct ones).

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

The square root of 11061891 is about 3325.9421221663. The cubic root of 11061891 is about 222.8143333169.

It can be divided in two parts, 110 and 61891, that added together give a square (62001 = 249²).

The spelling of 11061891 in words is "eleven million, sixty-one thousand, eight hundred ninety-one".