999976999 has 8 divisors (see below), whose sum is σ = 1143769088. Its totient is φ = 856419480.

The previous prime is 999976979. The next prime is 999977021. The reversal of 999976999 is 999679999.

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

It is not a de Polignac number, because 999976999 - 2¹⁹ = 999452711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999976979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49407 + ... + 66640.

It is an arithmetic number, because the mean of its divisors is an integer number (142971136).

Almost surely, 2^999976999 is an apocalyptic number.

999976999 is a deficient number, since it is larger than the sum of its proper divisors (143792089).

999976999 is a wasteful number, since it uses less digits than its factorization.

999976999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117285.

The product of its digits is 200884698, while the sum is 76.

The square root of 999976999 is about 31622.4129218502. The cubic root of 999976999 is about 999.9923329412.

The spelling of 999976999 in words is "nine hundred ninety-nine million, nine hundred seventy-six thousand, nine hundred ninety-nine".