899987773 has 2 divisors, whose sum is σ = 899987774. Its totient is φ = 899987772.

The previous prime is 899987771. The next prime is 899987783. The reversal of 899987773 is 377789998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612414009 + 287573764 = 24747^2 + 16958^2 .

It is a cyclic number.

It is not a de Polignac number, because 899987773 - 2¹ = 899987771 is a prime.

Together with 899987771, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 899987699 and 899987708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899987771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449993886 + 449993887.

It is an arithmetic number, because the mean of its divisors is an integer number (449993887).

Almost surely, 2^899987773 is an apocalyptic number.

It is an amenable number.

899987773 is a deficient number, since it is larger than the sum of its proper divisors (1).

899987773 is an equidigital number, since it uses as much as digits as its factorization.

899987773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48009024, while the sum is 67.

The square root of 899987773 is about 29999.7962159745. The cubic root of 899987773 is about 965.4850123493.

The spelling of 899987773 in words is "eight hundred ninety-nine million, nine hundred eighty-seven thousand, seven hundred seventy-three".