899849 has 2 divisors, whose sum is σ = 899850. Its totient is φ = 899848.

The previous prime is 899831. The next prime is 899851. The reversal of 899849 is 948998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 102400 = 893^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899849 is a prime.

Together with 899851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (899149) 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, 449924 + 449925.

It is an arithmetic number, because the mean of its divisors is an integer number (449925).

2⁸⁹⁹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

899849 is a deficient number, since it is larger than the sum of its proper divisors (1).

899849 is an equidigital number, since it uses as much as digits as its factorization.

899849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 47.

The square root of 899849 is about 948.6037107243. The cubic root of 899849 is about 96.5435385698.

The spelling of 899849 in words is "eight hundred ninety-nine thousand, eight hundred forty-nine".