11409971 has 2 divisors, whose sum is σ = 11409972. Its totient is φ = 11409970.

The previous prime is 11409961. The next prime is 11409977. The reversal of 11409971 is 17990411.

It is a happy number.

11409971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11409971 is a prime.

It is not a weakly prime, because it can be changed into another prime (11409977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5704985 + 5704986.

It is an arithmetic number, because the mean of its divisors is an integer number (5704986).

Almost surely, 2^11409971 is an apocalyptic number.

11409971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11409971 is an equidigital number, since it uses as much as digits as its factorization.

11409971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 11409971 is about 3377.8648581611. The cubic root of 11409971 is about 225.1273090227.

It can be divided in two parts, 1140 and 9971, that added together give a palindrome (11111).

The spelling of 11409971 in words is "eleven million, four hundred nine thousand, nine hundred seventy-one".