11431447 has 2 divisors, whose sum is σ = 11431448. Its totient is φ = 11431446.

The previous prime is 11431403. The next prime is 11431471. The reversal of 11431447 is 74413411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11431447 - 2¹¹ = 11429399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715723 + 5715724.

It is an arithmetic number, because the mean of its divisors is an integer number (5715724).

Almost surely, 2^11431447 is an apocalyptic number.

11431447 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431447 is an equidigital number, since it uses as much as digits as its factorization.

11431447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 11431447 is about 3381.0422949144. The cubic root of 11431447 is about 225.2684663741.

Adding to 11431447 its reverse (74413411), we get a palindrome (85844858).

It can be divided in two parts, 1143144 and 7, that multiplied together give a palindrome (8002008).

The spelling of 11431447 in words is "eleven million, four hundred thirty-one thousand, four hundred forty-seven".