999941879 has 2 divisors, whose sum is σ = 999941880. Its totient is φ = 999941878.

The previous prime is 999941849. The next prime is 999941881. The reversal of 999941879 is 978149999.

It is a strong prime.

It is an emirp because it is prime and its reverse (978149999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999941879 - 2⁸ = 999941623 is a prime.

It is a super-2 number, since 2×999941879² = 1999767522756101282, which contains 22 as substring.

Together with 999941881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999941849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499970939 + 499970940.

It is an arithmetic number, because the mean of its divisors is an integer number (499970940).

Almost surely, 2^999941879 is an apocalyptic number.

999941879 is a deficient number, since it is larger than the sum of its proper divisors (1).

999941879 is an equidigital number, since it uses as much as digits as its factorization.

999941879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 65.

The square root of 999941879 is about 31621.8576146311. The cubic root of 999941879 is about 999.9806259580.

The spelling of 999941879 in words is "nine hundred ninety-nine million, nine hundred forty-one thousand, eight hundred seventy-nine".