998187968153 has 2 divisors, whose sum is σ = 998187968154. Its totient is φ = 998187968152.

The previous prime is 998187968147. The next prime is 998187968179. The reversal of 998187968153 is 351869781899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866308593049 + 131879375104 = 930757^2 + 363152^2 .

It is an emirp because it is prime and its reverse (351869781899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998187968153 - 2⁴ = 998187968137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (998187968143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499093984076 + 499093984077.

It is an arithmetic number, because the mean of its divisors is an integer number (499093984077).

Almost surely, 2^998187968153 is an apocalyptic number.

It is an amenable number.

998187968153 is a deficient number, since it is larger than the sum of its proper divisors (1).

998187968153 is an equidigital number, since it uses as much as digits as its factorization.

998187968153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235146240, while the sum is 74.

The spelling of 998187968153 in words is "nine hundred ninety-eight billion, one hundred eighty-seven million, nine hundred sixty-eight thousand, one hundred fifty-three".