11309971 has 4 divisors (see below), whose sum is σ = 11700000. Its totient is φ = 10919944.

The previous prime is 11309953. The next prime is 11309999. The reversal of 11309971 is 17990311.

11309971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11309971 - 2⁷ = 11309843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11309911) 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, 194971 + ... + 195028.

It is an arithmetic number, because the mean of its divisors is an integer number (2925000).

Almost surely, 2^11309971 is an apocalyptic number.

11309971 is a deficient number, since it is larger than the sum of its proper divisors (390029).

11309971 is an equidigital number, since it uses as much as digits as its factorization.

11309971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390028.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 11309971 is about 3363.0300325748. The cubic root of 11309971 is about 224.4676864816.

The spelling of 11309971 in words is "eleven million, three hundred nine thousand, nine hundred seventy-one".