899828509 has 2 divisors, whose sum is σ = 899828510. Its totient is φ = 899828508.

The previous prime is 899828459. The next prime is 899828569. The reversal of 899828509 is 905828998.

It is a happy number.

899828509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713424100 + 186404409 = 26710^2 + 13653^2 .

It is a cyclic number.

It is not a de Polignac number, because 899828509 - 2⁹ = 899827997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899828569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449914254 + 449914255.

It is an arithmetic number, because the mean of its divisors is an integer number (449914255).

Almost surely, 2^899828509 is an apocalyptic number.

It is an amenable number.

899828509 is a deficient number, since it is larger than the sum of its proper divisors (1).

899828509 is an equidigital number, since it uses as much as digits as its factorization.

899828509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 58.

The square root of 899828509 is about 29997.1416805002. The cubic root of 899828509 is about 965.4280574732.

The spelling of 899828509 in words is "eight hundred ninety-nine million, eight hundred twenty-eight thousand, five hundred nine".