998560811 has 2 divisors, whose sum is σ = 998560812. Its totient is φ = 998560810.

The previous prime is 998560753. The next prime is 998560817. The reversal of 998560811 is 118065899.

998560811 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998560811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998560817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499280405 + 499280406.

It is an arithmetic number, because the mean of its divisors is an integer number (499280406).

Almost surely, 2^998560811 is an apocalyptic number.

998560811 is a deficient number, since it is larger than the sum of its proper divisors (1).

998560811 is an equidigital number, since it uses as much as digits as its factorization.

998560811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 998560811 is about 31600.0128322759. The cubic root of 998560811 is about 999.5200400086.

The spelling of 998560811 in words is "nine hundred ninety-eight million, five hundred sixty thousand, eight hundred eleven".