998866177 has 2 divisors, whose sum is σ = 998866178. Its totient is φ = 998866176.

The previous prime is 998866151. The next prime is 998866199. The reversal of 998866177 is 771668899.

998866177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998812816 + 53361 = 31604^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 998866177 - 2²³ = 990477569 is a prime.

It is not a weakly prime, because it can be changed into another prime (998866147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499433088 + 499433089.

It is an arithmetic number, because the mean of its divisors is an integer number (499433089).

Almost surely, 2^998866177 is an apocalyptic number.

It is an amenable number.

998866177 is a deficient number, since it is larger than the sum of its proper divisors (1).

998866177 is an equidigital number, since it uses as much as digits as its factorization.

998866177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 61.

The square root of 998866177 is about 31604.8442014828. The cubic root of 998866177 is about 999.6219160706.

The spelling of 998866177 in words is "nine hundred ninety-eight million, eight hundred sixty-six thousand, one hundred seventy-seven".