1988622019 has 2 divisors, whose sum is σ = 1988622020. Its totient is φ = 1988622018.

The previous prime is 1988621951. The next prime is 1988622037. The reversal of 1988622019 is 9102268891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988622019 - 2¹³ = 1988613827 is a prime.

It is a super-2 number, since 2×1988622019² = 7909235068903272722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1988622019.

It is not a weakly prime, because it can be changed into another prime (1988622079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994311009 + 994311010.

It is an arithmetic number, because the mean of its divisors is an integer number (994311010).

Almost surely, 2^1988622019 is an apocalyptic number.

1988622019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988622019 is an equidigital number, since it uses as much as digits as its factorization.

1988622019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 1988622019 is about 44593.9684150222. The cubic root of 1988622019 is about 1257.5272784642.

It can be divided in two parts, 19886 and 22019, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 1988622019 in words is "one billion, nine hundred eighty-eight million, six hundred twenty-two thousand, nineteen".