998188080949 has 2 divisors, whose sum is σ = 998188080950. Its totient is φ = 998188080948.

The previous prime is 998188080947. The next prime is 998188080977. The reversal of 998188080949 is 949080881899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995185808100 + 3002272849 = 997590^2 + 54793^2 .

It is a cyclic number.

It is not a de Polignac number, because 998188080949 - 2¹ = 998188080947 is a prime.

Together with 998188080947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998188080947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499094040474 + 499094040475.

It is an arithmetic number, because the mean of its divisors is an integer number (499094040475).

Almost surely, 2^998188080949 is an apocalyptic number.

It is an amenable number.

998188080949 is a deficient number, since it is larger than the sum of its proper divisors (1).

998188080949 is an equidigital number, since it uses as much as digits as its factorization.

998188080949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107495424, while the sum is 73.

The spelling of 998188080949 in words is "nine hundred ninety-eight billion, one hundred eighty-eight million, eighty thousand, nine hundred forty-nine".