899149 has 2 divisors, whose sum is σ = 899150. Its totient is φ = 899148.

The previous prime is 899123. The next prime is 899153. The reversal of 899149 is 941998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 243049 = 810^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 899149 - 2¹¹ = 897101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449574 + 449575.

It is an arithmetic number, because the mean of its divisors is an integer number (449575).

2⁸⁹⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

899149 is a deficient number, since it is larger than the sum of its proper divisors (1).

899149 is an equidigital number, since it uses as much as digits as its factorization.

899149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 899149 is about 948.2346755946. The cubic root of 899149 is about 96.5184980691.

Subtracting 899149 from its reverse (941998), we obtain a square (42849 = 207²).

The spelling of 899149 in words is "eight hundred ninety-nine thousand, one hundred forty-nine".