11969971 has 8 divisors (see below), whose sum is σ = 12951680. Its totient is φ = 10996992.

The previous prime is 11969963. The next prime is 11969987. The reversal of 11969971 is 17996911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11969971 - 2³ = 11969963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11969911) 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, 835 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (1618960).

Almost surely, 2^11969971 is an apocalyptic number.

11969971 is a deficient number, since it is larger than the sum of its proper divisors (981709).

11969971 is a wasteful number, since it uses less digits than its factorization.

11969971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365.

The product of its digits is 30618, while the sum is 43.

The square root of 11969971 is about 3459.7645873672. The cubic root of 11969971 is about 228.7517188599.

The spelling of 11969971 in words is "eleven million, nine hundred sixty-nine thousand, nine hundred seventy-one".