999905006 has 4 divisors (see below), whose sum is σ = 1499857512. Its totient is φ = 499952502.

The previous prime is 999904993. The next prime is 999905029. The reversal of 999905006 is 600509999.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 249976250 + ... + 249976253.

It is an arithmetic number, because the mean of its divisors is an integer number (374964378).

Almost surely, 2^999905006 is an apocalyptic number.

999905006 is a deficient number, since it is larger than the sum of its proper divisors (499952506).

999905006 is a wasteful number, since it uses less digits than its factorization.

999905006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499952505.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 999905006 is about 31621.2745789919. The cubic root of 999905006 is about 999.9683343306.

The spelling of 999905006 in words is "nine hundred ninety-nine million, nine hundred five thousand, six".