999984707 has 2 divisors, whose sum is σ = 999984708. Its totient is φ = 999984706.

The previous prime is 999984697. The next prime is 999984709. The reversal of 999984707 is 707489999.

It is a strong prime.

It is an emirp because it is prime and its reverse (707489999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999984707 - 2⁴ = 999984691 is a prime.

Together with 999984709, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999984707.

It is not a weakly prime, because it can be changed into another prime (999984709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499992353 + 499992354.

It is an arithmetic number, because the mean of its divisors is an integer number (499992354).

Almost surely, 2^999984707 is an apocalyptic number.

999984707 is a deficient number, since it is larger than the sum of its proper divisors (1).

999984707 is an equidigital number, since it uses as much as digits as its factorization.

999984707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The square root of 999984707 is about 31622.5347971980. The cubic root of 999984707 is about 999.9949023073.

The spelling of 999984707 in words is "nine hundred ninety-nine million, nine hundred eighty-four thousand, seven hundred seven".