998968153 has 2 divisors, whose sum is σ = 998968154. Its totient is φ = 998968152.

The previous prime is 998968151. The next prime is 998968169. The reversal of 998968153 is 351869899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568488649 + 430479504 = 23843^2 + 20748^2 .

It is a cyclic number.

It is not a de Polignac number, because 998968153 - 2¹ = 998968151 is a prime.

Together with 998968151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (998968151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499484076 + 499484077.

It is an arithmetic number, because the mean of its divisors is an integer number (499484077).

Almost surely, 2^998968153 is an apocalyptic number.

It is an amenable number.

998968153 is a deficient number, since it is larger than the sum of its proper divisors (1).

998968153 is an equidigital number, since it uses as much as digits as its factorization.

998968153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 58.

The square root of 998968153 is about 31606.4574572982. The cubic root of 998968153 is about 999.6559326312.

The spelling of 998968153 in words is "nine hundred ninety-eight million, nine hundred sixty-eight thousand, one hundred fifty-three".