998694811 has 2 divisors, whose sum is σ = 998694812. Its totient is φ = 998694810.

The previous prime is 998694797. The next prime is 998694817. The reversal of 998694811 is 118496899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998694811 - 2²³ = 990306203 is a prime.

It is not a weakly prime, because it can be changed into another prime (998694817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499347405 + 499347406.

It is an arithmetic number, because the mean of its divisors is an integer number (499347406).

Almost surely, 2^998694811 is an apocalyptic number.

998694811 is the 18246-th hex number.

998694811 is a deficient number, since it is larger than the sum of its proper divisors (1).

998694811 is an equidigital number, since it uses as much as digits as its factorization.

998694811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 55.

The square root of 998694811 is about 31602.1330134534. The cubic root of 998694811 is about 999.5647475828.

The spelling of 998694811 in words is "nine hundred ninety-eight million, six hundred ninety-four thousand, eight hundred eleven".