11489971 has 2 divisors, whose sum is σ = 11489972. Its totient is φ = 11489970.

The previous prime is 11489969. The next prime is 11489983. The reversal of 11489971 is 17998411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11489971 - 2¹ = 11489969 is a prime.

Together with 11489969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11489911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5744985 + 5744986.

It is an arithmetic number, because the mean of its divisors is an integer number (5744986).

Almost surely, 2^11489971 is an apocalyptic number.

11489971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11489971 is an equidigital number, since it uses as much as digits as its factorization.

11489971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 40.

The square root of 11489971 is about 3389.6859736560. The cubic root of 11489971 is about 225.6522374865.

The spelling of 11489971 in words is "eleven million, four hundred eighty-nine thousand, nine hundred seventy-one".