1000646005 has 16 divisors (see below), whose sum is σ = 1226937600. Its totient is φ = 783237312.

The previous prime is 1000645973. The next prime is 1000646047. The reversal of 1000646005 is 5006460001.

It is a cyclic number.

It is not a de Polignac number, because 1000646005 - 2⁵ = 1000645973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39892 + ... + 59938.

It is an arithmetic number, because the mean of its divisors is an integer number (76683600).

Almost surely, 2^1000646005 is an apocalyptic number.

It is an amenable number.

1000646005 is a deficient number, since it is larger than the sum of its proper divisors (226291595).

1000646005 is a wasteful number, since it uses less digits than its factorization.

1000646005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20268.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1000646005 is about 31632.9891885038. The cubic root of 1000646005 is about 1000.2152886475.

The spelling of 1000646005 in words is "one billion, six hundred forty-six thousand, five".