1999005706 has 8 divisors (see below), whose sum is σ = 2999027844. Its totient is φ = 999329760.

The previous prime is 1999005683. The next prime is 1999005719. The reversal of 1999005706 is 6075009991.

It can be written as a sum of positive squares in 2 ways, for example, as 1702305081 + 296700625 = 41259^2 + 17225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71595 + ... + 95518.

Almost surely, 2^1999005706 is an apocalyptic number.

1999005706 is a deficient number, since it is larger than the sum of its proper divisors (1000022138).

1999005706 is a wasteful number, since it uses less digits than its factorization.

1999005706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173096.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 1999005706 is about 44710.2416231449. The cubic root of 1999005706 is about 1259.7122266290.

The spelling of 1999005706 in words is "one billion, nine hundred ninety-nine million, five thousand, seven hundred six".