193589309025989 has 2 divisors, whose sum is σ = 193589309025990. Its totient is φ = 193589309025988.

The previous prime is 193589309025887. The next prime is 193589309025991. The reversal of 193589309025989 is 989520903985391.

193589309025989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147647821685764 + 45941487340225 = 12151042^2 + 6778015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193589309025989 is a prime.

It is a super-2 number, since 2×193589309025989² (a number of 29 digits) contains 22 as substring.

Together with 193589309025991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193589309025089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96794654512994 + 96794654512995.

It is an arithmetic number, because the mean of its divisors is an integer number (96794654512995).

Almost surely, 2^{193589309025989} is an apocalyptic number.

It is an amenable number.

193589309025989 is a deficient number, since it is larger than the sum of its proper divisors (1).

193589309025989 is an equidigital number, since it uses as much as digits as its factorization.

193589309025989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1700611200, while the sum is 80.

The spelling of 193589309025989 in words is "one hundred ninety-three trillion, five hundred eighty-nine billion, three hundred nine million, twenty-five thousand, nine hundred eighty-nine".