1005145447 has 2 divisors, whose sum is σ = 1005145448. Its totient is φ = 1005145446.

The previous prime is 1005145433. The next prime is 1005145483. The reversal of 1005145447 is 7445415001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7445415001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005145447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005142447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502572723 + 502572724.

It is an arithmetic number, because the mean of its divisors is an integer number (502572724).

Almost surely, 2^1005145447 is an apocalyptic number.

1005145447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005145447 is an equidigital number, since it uses as much as digits as its factorization.

1005145447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 1005145447 is about 31704.0288764693. The cubic root of 1005145447 is about 1001.7122156444.

The spelling of 1005145447 in words is "one billion, five million, one hundred forty-five thousand, four hundred forty-seven".