899939 has 2 divisors, whose sum is σ = 899940. Its totient is φ = 899938.

The previous prime is 899917. The next prime is 899971. The reversal of 899939 is 939998.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899939 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 899893 and 899902.

It is not a weakly prime, because it can be changed into another prime (893939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449969 + 449970.

It is an arithmetic number, because the mean of its divisors is an integer number (449970).

2⁸⁹⁹⁹³⁹ is an apocalyptic number.

899939 is a deficient number, since it is larger than the sum of its proper divisors (1).

899939 is an equidigital number, since it uses as much as digits as its factorization.

899939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 899939 is about 948.6511476829. The cubic root of 899939 is about 96.5467571204.

The spelling of 899939 in words is "eight hundred ninety-nine thousand, nine hundred thirty-nine".