1005463987 has 4 divisors (see below), whose sum is σ = 1096869816. Its totient is φ = 914058160.

The previous prime is 1005463981. The next prime is 1005463999. The reversal of 1005463987 is 7893645001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1005463987 - 2¹⁹ = 1004939699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005463981) 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 in 3 ways as a sum of consecutive naturals, for example, 45702898 + ... + 45702919.

It is an arithmetic number, because the mean of its divisors is an integer number (274217454).

Almost surely, 2^1005463987 is an apocalyptic number.

1005463987 is a deficient number, since it is larger than the sum of its proper divisors (91405829).

1005463987 is an equidigital number, since it uses as much as digits as its factorization.

1005463987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91405828.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1005463987 is about 31709.0521302672. The cubic root of 1005463987 is about 1001.8180217938.

The spelling of 1005463987 in words is "one billion, five million, four hundred sixty-three thousand, nine hundred eighty-seven".