999940229 has 2 divisors, whose sum is σ = 999940230. Its totient is φ = 999940228.

The previous prime is 999940223. The next prime is 999940273. The reversal of 999940229 is 922049999.

999940229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634939204 + 365001025 = 25198^2 + 19105^2 .

It is a cyclic number.

It is not a de Polignac number, because 999940229 - 2²⁸ = 731504773 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 (999940223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499970114 + 499970115.

It is an arithmetic number, because the mean of its divisors is an integer number (499970115).

Almost surely, 2^999940229 is an apocalyptic number.

It is an amenable number.

999940229 is a deficient number, since it is larger than the sum of its proper divisors (1).

999940229 is an equidigital number, since it uses as much as digits as its factorization.

999940229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 999940229 is about 31621.8315250714. The cubic root of 999940229 is about 999.9800759364.

The spelling of 999940229 in words is "nine hundred ninety-nine million, nine hundred forty thousand, two hundred twenty-nine".