11917471 has 4 divisors (see below), whose sum is σ = 11928744. Its totient is φ = 11906200.

The previous prime is 11917457. The next prime is 11917481. The reversal of 11917471 is 17471911.

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 11917471 - 2⁵ = 11917439 is a prime.

It is a super-3 number, since 3×11917471³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11917481) 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, 3865 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (2982186).

Almost surely, 2^11917471 is an apocalyptic number.

11917471 is a deficient number, since it is larger than the sum of its proper divisors (11273).

11917471 is a wasteful number, since it uses less digits than its factorization.

11917471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11272.

The product of its digits is 1764, while the sum is 31.

The square root of 11917471 is about 3452.1690283067. The cubic root of 11917471 is about 228.4167955788.

The spelling of 11917471 in words is "eleven million, nine hundred seventeen thousand, four hundred seventy-one".