201323997197 has 2 divisors, whose sum is σ = 201323997198. Its totient is φ = 201323997196.

The previous prime is 201323997179. The next prime is 201323997211. The reversal of 201323997197 is 791799323102.

Together with previous prime (201323997179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149072437801 + 52251559396 = 386099^2 + 228586^2 .

It is a cyclic number.

It is not a de Polignac number, because 201323997197 - 2¹⁰ = 201323996173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201323997157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100661998598 + 100661998599.

It is an arithmetic number, because the mean of its divisors is an integer number (100661998599).

Almost surely, 2^201323997197 is an apocalyptic number.

It is an amenable number.

201323997197 is a deficient number, since it is larger than the sum of its proper divisors (1).

201323997197 is an equidigital number, since it uses as much as digits as its factorization.

201323997197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 201323997197 in words is "two hundred one billion, three hundred twenty-three million, nine hundred ninety-seven thousand, one hundred ninety-seven".