201089197 has 2 divisors, whose sum is σ = 201089198. Its totient is φ = 201089196.

The previous prime is 201089167. The next prime is 201089233. The reversal of 201089197 is 791980102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176199076 + 24890121 = 13274^2 + 4989^2 .

It is a cyclic number.

It is not a de Polignac number, because 201089197 - 2¹⁹ = 200564909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201089167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100544598 + 100544599.

It is an arithmetic number, because the mean of its divisors is an integer number (100544599).

Almost surely, 2^201089197 is an apocalyptic number.

It is an amenable number.

201089197 is a deficient number, since it is larger than the sum of its proper divisors (1).

201089197 is an equidigital number, since it uses as much as digits as its factorization.

201089197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 201089197 is about 14180.5922654874. The cubic root of 201089197 is about 585.8632367302.

The spelling of 201089197 in words is "two hundred one million, eighty-nine thousand, one hundred ninety-seven".