999997706 has 16 divisors (see below), whose sum is σ = 1512513000. Its totient is φ = 495837888.

The previous prime is 999997697. The next prime is 999997717. The reversal of 999997706 is 607799999.

It can be written as a sum of positive squares in 4 ways, for example, as 299601481 + 700396225 = 17309^2 + 26465^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208916 + ... + 213648.

Almost surely, 2^999997706 is an apocalyptic number.

999997706 is a deficient number, since it is larger than the sum of its proper divisors (512515294).

999997706 is a wasteful number, since it uses less digits than its factorization.

999997706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593.

The product of its (nonzero) digits is 17360406, while the sum is 65.

The square root of 999997706 is about 31622.7403303382. The cubic root of 999997706 is about 999.9992353327. Note that the first 3 decimals are identical.

The spelling of 999997706 in words is "nine hundred ninety-nine million, nine hundred ninety-seven thousand, seven hundred six".