899247823 has 2 divisors, whose sum is σ = 899247824. Its totient is φ = 899247822.

The previous prime is 899247779. The next prime is 899247829. The reversal of 899247823 is 328742998.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 899247823 - 2⁹ = 899247311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899247829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449623911 + 449623912.

It is an arithmetic number, because the mean of its divisors is an integer number (449623912).

Almost surely, 2^899247823 is an apocalyptic number.

899247823 is a deficient number, since it is larger than the sum of its proper divisors (1).

899247823 is an equidigital number, since it uses as much as digits as its factorization.

899247823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 899247823 is about 29987.4610962649. The cubic root of 899247823 is about 965.2203396738.

The spelling of 899247823 in words is "eight hundred ninety-nine million, two hundred forty-seven thousand, eight hundred twenty-three".