11471371447 has 2 divisors, whose sum is σ = 11471371448. Its totient is φ = 11471371446.

The previous prime is 11471371421. The next prime is 11471371489. The reversal of 11471371447 is 74417317411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11471371447 - 2¹⁹ = 11470847159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11471371147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5735685723 + 5735685724.

It is an arithmetic number, because the mean of its divisors is an integer number (5735685724).

Almost surely, 2^11471371447 is an apocalyptic number.

11471371447 is a deficient number, since it is larger than the sum of its proper divisors (1).

11471371447 is an equidigital number, since it uses as much as digits as its factorization.

11471371447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 40.

Adding to 11471371447 its reverse (74417317411), we get a palindrome (85888688858).

The spelling of 11471371447 in words is "eleven billion, four hundred seventy-one million, three hundred seventy-one thousand, four hundred forty-seven".