5911891 has 4 divisors (see below), whose sum is σ = 5969392. Its totient is φ = 5854392.

The previous prime is 5911883. The next prime is 5911901. The reversal of 5911891 is 1981195.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1981195 = 5 ⋅396239.

It is a cyclic number.

It is not a de Polignac number, because 5911891 - 2³ = 5911883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5911811) 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, 28596 + ... + 28801.

It is an arithmetic number, because the mean of its divisors is an integer number (1492348).

Almost surely, 2^5911891 is an apocalyptic number.

5911891 is a deficient number, since it is larger than the sum of its proper divisors (57501).

5911891 is a wasteful number, since it uses less digits than its factorization.

5911891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57500.

The product of its digits is 3240, while the sum is 34.

The square root of 5911891 is about 2431.4380518533. The cubic root of 5911891 is about 180.8181990680.

The spelling of 5911891 in words is "five million, nine hundred eleven thousand, eight hundred ninety-one".