999941279 has 2 divisors, whose sum is σ = 999941280. Its totient is φ = 999941278.

The previous prime is 999941273. The next prime is 999941297. The reversal of 999941279 is 972149999.

Together with next prime (999941297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (972149999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999941279 - 2¹⁶ = 999875743 is a prime.

It is a super-2 number, since 2×999941279² = 1999765122896311682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999941273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499970639 + 499970640.

It is an arithmetic number, because the mean of its divisors is an integer number (499970640).

Almost surely, 2^999941279 is an apocalyptic number.

999941279 is a deficient number, since it is larger than the sum of its proper divisors (1).

999941279 is an equidigital number, since it uses as much as digits as its factorization.

999941279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 59.

The square root of 999941279 is about 31621.8481275209. The cubic root of 999941279 is about 999.9804259502.

The spelling of 999941279 in words is "nine hundred ninety-nine million, nine hundred forty-one thousand, two hundred seventy-nine".