998764867 has 2 divisors, whose sum is σ = 998764868. Its totient is φ = 998764866.

The previous prime is 998764831. The next prime is 998764873. The reversal of 998764867 is 768467899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998764867 - 2¹¹ = 998762819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998764799 and 998764808.

It is not a weakly prime, because it can be changed into another prime (998764367) 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, 499382433 + 499382434.

It is an arithmetic number, because the mean of its divisors is an integer number (499382434).

Almost surely, 2^998764867 is an apocalyptic number.

998764867 is a deficient number, since it is larger than the sum of its proper divisors (1).

998764867 is an equidigital number, since it uses as much as digits as its factorization.

998764867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 64.

The square root of 998764867 is about 31603.2414002108. The cubic root of 998764867 is about 999.5881193776.

The spelling of 998764867 in words is "nine hundred ninety-eight million, seven hundred sixty-four thousand, eight hundred sixty-seven".