999149 has 2 divisors, whose sum is σ = 999150. Its totient is φ = 999148.

The previous prime is 999133. The next prime is 999169. The reversal of 999149 is 941999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 310249 = 830^2 + 557^2 .

It is an emirp because it is prime and its reverse (941999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999149 - 2⁴ = 999133 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999149.

It is not a weakly prime, because it can be changed into another prime (999169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499574 + 499575.

It is an arithmetic number, because the mean of its divisors is an integer number (499575).

2⁹⁹⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

999149 is a deficient number, since it is larger than the sum of its proper divisors (1).

999149 is an equidigital number, since it uses as much as digits as its factorization.

999149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 41.

The square root of 999149 is about 999.5744094363. The cubic root of 999149 is about 99.9716252828.

The spelling of 999149 in words is "nine hundred ninety-nine thousand, one hundred forty-nine".