1988199271 has 2 divisors, whose sum is σ = 1988199272. Its totient is φ = 1988199270.

The previous prime is 1988199253. The next prime is 1988199277. The reversal of 1988199271 is 1729918891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988199271 - 2²¹ = 1986102119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988199277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994099635 + 994099636.

It is an arithmetic number, because the mean of its divisors is an integer number (994099636).

Almost surely, 2^1988199271 is an apocalyptic number.

1988199271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988199271 is an equidigital number, since it uses as much as digits as its factorization.

1988199271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 55.

The square root of 1988199271 is about 44589.2281947109. The cubic root of 1988199271 is about 1257.4381623472.

The spelling of 1988199271 in words is "one billion, nine hundred eighty-eight million, one hundred ninety-nine thousand, two hundred seventy-one".