11897871 has 8 divisors (see below), whose sum is σ = 15946800. Its totient is φ = 7890432.

The previous prime is 11897863. The next prime is 11897891. The reversal of 11897871 is 17879811.

It is a happy number.

11897871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11897871 - 2³ = 11897863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9696 + ... + 10853.

It is an arithmetic number, because the mean of its divisors is an integer number (1993350).

Almost surely, 2^11897871 is an apocalyptic number.

11897871 is a deficient number, since it is larger than the sum of its proper divisors (4048929).

11897871 is a wasteful number, since it uses less digits than its factorization.

11897871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20745.

The product of its digits is 28224, while the sum is 42.

The square root of 11897871 is about 3449.3290651951. The cubic root of 11897871 is about 228.2915054123.

The spelling of 11897871 in words is "eleven million, eight hundred ninety-seven thousand, eight hundred seventy-one".