1005438747 has 6 divisors (see below), whose sum is σ = 1340658228. Its totient is φ = 670255884.

The previous prime is 1005438653. The next prime is 1005438761. The reversal of 1005438747 is 7478345001.

It is not a de Polignac number, because 1005438747 - 2⁷ = 1005438619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1005438047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45768 + ... + 64074.

It is an arithmetic number, because the mean of its divisors is an integer number (223443038).

Almost surely, 2^1005438747 is an apocalyptic number.

1005438747 is a deficient number, since it is larger than the sum of its proper divisors (335219481).

1005438747 is an frugal number, since it uses more digits than its factorization.

1005438747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36617 (or 18310 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 1005438747 is about 31708.6541341634. The cubic root of 1005438747 is about 1001.8096388983.

The spelling of 1005438747 in words is "one billion, five million, four hundred thirty-eight thousand, seven hundred forty-seven".