11389971 has 8 divisors (see below), whose sum is σ = 15394960. Its totient is φ = 7489152.

The previous prime is 11389957. The next prime is 11389979. The reversal of 11389971 is 17998311.

11389971 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 11389971 - 2⁶ = 11389907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11389979) 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, 25786 + ... + 26223.

It is an arithmetic number, because the mean of its divisors is an integer number (1924370).

Almost surely, 2^11389971 is an apocalyptic number.

11389971 is a deficient number, since it is larger than the sum of its proper divisors (4004989).

11389971 is an equidigital number, since it uses as much as digits as its factorization.

11389971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52085.

The product of its digits is 13608, while the sum is 39.

The square root of 11389971 is about 3374.9031097203. The cubic root of 11389971 is about 224.9956937447.

The spelling of 11389971 in words is "eleven million, three hundred eighty-nine thousand, nine hundred seventy-one".