1331447147 has 2 divisors, whose sum is σ = 1331447148. Its totient is φ = 1331447146.

The previous prime is 1331447083. The next prime is 1331447171. The reversal of 1331447147 is 7417441331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331447147 - 2⁶ = 1331447083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331447177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665723573 + 665723574.

It is an arithmetic number, because the mean of its divisors is an integer number (665723574).

Almost surely, 2^1331447147 is an apocalyptic number.

1331447147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331447147 is an equidigital number, since it uses as much as digits as its factorization.

1331447147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 1331447147 is about 36489.0003562718. Note that the first 3 decimals coincide. The cubic root of 1331447147 is about 1100.1231672002.

Adding to 1331447147 its reverse (7417441331), we get a palindrome (8748888478).

The spelling of 1331447147 in words is "one billion, three hundred thirty-one million, four hundred forty-seven thousand, one hundred forty-seven".