899211977 has 2 divisors, whose sum is σ = 899211978. Its totient is φ = 899211976.

The previous prime is 899211953. The next prime is 899212033. The reversal of 899211977 is 779112998.

899211977 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., 767788681 + 131423296 = 27709^2 + 11464^2 .

It is a cyclic number.

It is not a de Polignac number, because 899211977 - 2⁶ = 899211913 is a prime.

It is not a weakly prime, because it can be changed into another prime (899213977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449605988 + 449605989.

It is an arithmetic number, because the mean of its divisors is an integer number (449605989).

Almost surely, 2^899211977 is an apocalyptic number.

It is an amenable number.

899211977 is a deficient number, since it is larger than the sum of its proper divisors (1).

899211977 is an equidigital number, since it uses as much as digits as its factorization.

899211977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 53.

The square root of 899211977 is about 29986.8634071655. The cubic root of 899211977 is about 965.2075142334.

The spelling of 899211977 in words is "eight hundred ninety-nine million, two hundred eleven thousand, nine hundred seventy-seven".