197906006461 has 2 divisors, whose sum is σ = 197906006462. Its totient is φ = 197906006460.

The previous prime is 197906006443. The next prime is 197906006513. The reversal of 197906006461 is 164600609791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150384186436 + 47521820025 = 387794^2 + 217995^2 .

It is a cyclic number.

It is not a de Polignac number, because 197906006461 - 2³³ = 189316071869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197906006161) 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, 98953003230 + 98953003231.

It is an arithmetic number, because the mean of its divisors is an integer number (98953003231).

Almost surely, 2^197906006461 is an apocalyptic number.

It is an amenable number.

197906006461 is a deficient number, since it is larger than the sum of its proper divisors (1).

197906006461 is an equidigital number, since it uses as much as digits as its factorization.

197906006461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 197906006461 in words is "one hundred ninety-seven billion, nine hundred six million, six thousand, four hundred sixty-one".