2019981427 has 2 divisors, whose sum is σ = 2019981428. Its totient is φ = 2019981426.

The previous prime is 2019981401. The next prime is 2019981433. The reversal of 2019981427 is 7241899102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2019981427 - 2²³ = 2011592819 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (2019981437) 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, 1009990713 + 1009990714.

It is an arithmetic number, because the mean of its divisors is an integer number (1009990714).

Almost surely, 2^2019981427 is an apocalyptic number.

2019981427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019981427 is an equidigital number, since it uses as much as digits as its factorization.

2019981427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 2019981427 is about 44944.2034861004. The cubic root of 2019981427 is about 1264.1029905516.

The spelling of 2019981427 in words is "two billion, nineteen million, nine hundred eighty-one thousand, four hundred twenty-seven".