999989141 has 2 divisors, whose sum is σ = 999989142. Its totient is φ = 999989140.

The previous prime is 999989087. The next prime is 999989143. The reversal of 999989141 is 141989999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895745041 + 104244100 = 29929^2 + 10210^2 .

It is a cyclic number.

It is not a de Polignac number, because 999989141 - 2¹⁰ = 999988117 is a prime.

Together with 999989143, 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 (999989143) 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, 499994570 + 499994571.

It is an arithmetic number, because the mean of its divisors is an integer number (499994571).

Almost surely, 2^999989141 is an apocalyptic number.

It is an amenable number.

999989141 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989141 is an equidigital number, since it uses as much as digits as its factorization.

999989141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 59.

The square root of 999989141 is about 31622.6049053521. The cubic root of 999989141 is about 999.9963803202.

The spelling of 999989141 in words is "nine hundred ninety-nine million, nine hundred eighty-nine thousand, one hundred forty-one".