11906191 has 4 divisors (see below), whose sum is σ = 12988584. Its totient is φ = 10823800.

The previous prime is 11906177. The next prime is 11906231. The reversal of 11906191 is 19160911.

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 11906191 - 2⁵ = 11906159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11906131) 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, 541180 + ... + 541201.

It is an arithmetic number, because the mean of its divisors is an integer number (3247146).

Almost surely, 2^11906191 is an apocalyptic number.

11906191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11906191 is a deficient number, since it is larger than the sum of its proper divisors (1082393).

11906191 is a wasteful number, since it uses less digits than its factorization.

11906191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082392.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 11906191 is about 3450.5348860720. The cubic root of 11906191 is about 228.3447066043.

It can be divided in two parts, 1190 and 6191, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 11906191 in words is "eleven million, nine hundred six thousand, one hundred ninety-one".