819149 has 2 divisors, whose sum is σ = 819150. Its totient is φ = 819148.

The previous prime is 819131. The next prime is 819157. The reversal of 819149 is 941918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 354025 = 682^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 819149 - 2¹² = 815053 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 819149.

It is not a weakly prime, because it can be changed into another prime (819449) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409574 + 409575.

It is an arithmetic number, because the mean of its divisors is an integer number (409575).

2⁸¹⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

819149 is a deficient number, since it is larger than the sum of its proper divisors (1).

819149 is an equidigital number, since it uses as much as digits as its factorization.

819149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 32.

The square root of 819149 is about 905.0685056945. The cubic root of 819149 is about 93.5666258520.

The spelling of 819149 in words is "eight hundred nineteen thousand, one hundred forty-nine".