1998136027 has 2 divisors, whose sum is σ = 1998136028. Its totient is φ = 1998136026.

The previous prime is 1998136013. The next prime is 1998136033. The reversal of 1998136027 is 7206318991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1998136027 - 2¹⁹ = 1997611739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1998136087) 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, 999068013 + 999068014.

It is an arithmetic number, because the mean of its divisors is an integer number (999068014).

Almost surely, 2^1998136027 is an apocalyptic number.

1998136027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998136027 is an equidigital number, since it uses as much as digits as its factorization.

1998136027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1998136027 is about 44700.5148404356. The cubic root of 1998136027 is about 1259.5295184325.

The spelling of 1998136027 in words is "one billion, nine hundred ninety-eight million, one hundred thirty-six thousand, twenty-seven".