999930986 has 4 divisors (see below), whose sum is σ = 1499896482. Its totient is φ = 499965492.

The previous prime is 999930941. The next prime is 999931013. The reversal of 999930986 is 689039999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689039999 = 13001 ⋅52999.

It can be written as a sum of positive squares in only one way, i.e., 988159225 + 11771761 = 31435^2 + 3431^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249982745 + ... + 249982748.

Almost surely, 2^999930986 is an apocalyptic number.

999930986 is a deficient number, since it is larger than the sum of its proper divisors (499965496).

999930986 is a wasteful number, since it uses less digits than its factorization.

999930986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499965495.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 999930986 is about 31621.6853757038. The cubic root of 999930986 is about 999.9769948041.

The spelling of 999930986 in words is "nine hundred ninety-nine million, nine hundred thirty thousand, nine hundred eighty-six".