1005438047 has 2 divisors, whose sum is σ = 1005438048. Its totient is φ = 1005438046.

The previous prime is 1005438043. The next prime is 1005438059. The reversal of 1005438047 is 7408345001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005438047 - 2² = 1005438043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005438041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502719023 + 502719024.

It is an arithmetic number, because the mean of its divisors is an integer number (502719024).

Almost surely, 2^1005438047 is an apocalyptic number.

1005438047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005438047 is an equidigital number, since it uses as much as digits as its factorization.

1005438047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1005438047 is about 31708.6430961654. The cubic root of 1005438047 is about 1001.8094064072.

The spelling of 1005438047 in words is "one billion, five million, four hundred thirty-eight thousand, forty-seven".