19030439689 has 2 divisors, whose sum is σ = 19030439690. Its totient is φ = 19030439688.

The previous prime is 19030439669. The next prime is 19030439699. The reversal of 19030439689 is 98693403091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18335326464 + 695113225 = 135408^2 + 26365^2 .

It is a cyclic number.

It is not a de Polignac number, because 19030439689 - 2¹¹ = 19030437641 is a prime.

It is not a weakly prime, because it can be changed into another prime (19030439669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9515219844 + 9515219845.

It is an arithmetic number, because the mean of its divisors is an integer number (9515219845).

Almost surely, 2^19030439689 is an apocalyptic number.

It is an amenable number.

19030439689 is a deficient number, since it is larger than the sum of its proper divisors (1).

19030439689 is an equidigital number, since it uses as much as digits as its factorization.

19030439689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 19030439689 in words is "nineteen billion, thirty million, four hundred thirty-nine thousand, six hundred eighty-nine".