1440331147 has 2 divisors, whose sum is σ = 1440331148. Its totient is φ = 1440331146.

The previous prime is 1440331141. The next prime is 1440331163. The reversal of 1440331147 is 7411330441.

It is a weak prime.

It is an emirp because it is prime and its reverse (7411330441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440331147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440331141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720165573 + 720165574.

It is an arithmetic number, because the mean of its divisors is an integer number (720165574).

Almost surely, 2^1440331147 is an apocalyptic number.

1440331147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440331147 is an equidigital number, since it uses as much as digits as its factorization.

1440331147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1440331147 is about 37951.6949160377. The cubic root of 1440331147 is about 1129.3297894833.

Adding to 1440331147 its reverse (7411330441), we get a palindrome (8851661588).

The spelling of 1440331147 in words is "one billion, four hundred forty million, three hundred thirty-one thousand, one hundred forty-seven".