197689419589 has 2 divisors, whose sum is σ = 197689419590. Its totient is φ = 197689419588.

The previous prime is 197689419547. The next prime is 197689419617. The reversal of 197689419589 is 985914986791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99876857089 + 97812562500 = 316033^2 + 312750^2 .

It is a cyclic number.

It is not a de Polignac number, because 197689419589 - 2¹⁹ = 197688895301 is a prime.

It is a super-2 number, since 2×197689419589² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197689419509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98844709794 + 98844709795.

It is an arithmetic number, because the mean of its divisors is an integer number (98844709795).

Almost surely, 2^197689419589 is an apocalyptic number.

It is an amenable number.

197689419589 is a deficient number, since it is larger than the sum of its proper divisors (1).

197689419589 is an equidigital number, since it uses as much as digits as its factorization.

197689419589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 76.

The spelling of 197689419589 in words is "one hundred ninety-seven billion, six hundred eighty-nine million, four hundred nineteen thousand, five hundred eighty-nine".