999912167 has 2 divisors, whose sum is σ = 999912168. Its totient is φ = 999912166.

The previous prime is 999912131. The next prime is 999912197. The reversal of 999912167 is 761219999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999912167 - 2²⁴ = 983134951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999912197) 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, 499956083 + 499956084.

It is an arithmetic number, because the mean of its divisors is an integer number (499956084).

Almost surely, 2^999912167 is an apocalyptic number.

999912167 is a deficient number, since it is larger than the sum of its proper divisors (1).

999912167 is an equidigital number, since it uses as much as digits as its factorization.

999912167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 53.

The square root of 999912167 is about 31621.3878095191. The cubic root of 999912167 is about 999.9707214761.

The spelling of 999912167 in words is "nine hundred ninety-nine million, nine hundred twelve thousand, one hundred sixty-seven".