199960459597 has 2 divisors, whose sum is σ = 199960459598. Its totient is φ = 199960459596.

The previous prime is 199960459553. The next prime is 199960459607. The reversal of 199960459597 is 795954069991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170630129476 + 29330330121 = 413074^2 + 171261^2 .

It is a cyclic number.

It is not a de Polignac number, because 199960459597 - 2⁷ = 199960459469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199960459297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99980229798 + 99980229799.

It is an arithmetic number, because the mean of its divisors is an integer number (99980229799).

Almost surely, 2^199960459597 is an apocalyptic number.

It is an amenable number.

199960459597 is a deficient number, since it is larger than the sum of its proper divisors (1).

199960459597 is an equidigital number, since it uses as much as digits as its factorization.

199960459597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248005800, while the sum is 73.

The spelling of 199960459597 in words is "one hundred ninety-nine billion, nine hundred sixty million, four hundred fifty-nine thousand, five hundred ninety-seven".