999984371 has 2 divisors, whose sum is σ = 999984372. Its totient is φ = 999984370.

The previous prime is 999984367. The next prime is 999984373. The reversal of 999984371 is 173489999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999984371 - 2² = 999984367 is a prime.

Together with 999984373, 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 999984371.

It is not a weakly prime, because it can be changed into another prime (999984373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499992185 + 499992186.

It is an arithmetic number, because the mean of its divisors is an integer number (499992186).

Almost surely, 2^999984371 is an apocalyptic number.

999984371 is a deficient number, since it is larger than the sum of its proper divisors (1).

999984371 is an equidigital number, since it uses as much as digits as its factorization.

999984371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The square root of 999984371 is about 31622.5294845305. The cubic root of 999984371 is about 999.9947903062.

The spelling of 999984371 in words is "nine hundred ninety-nine million, nine hundred eighty-four thousand, three hundred seventy-one".