165150197 has 2 divisors, whose sum is σ = 165150198. Its totient is φ = 165150196.

The previous prime is 165150187. The next prime is 165150217. The reversal of 165150197 is 791051561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104325796 + 60824401 = 10214^2 + 7799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165150197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165150127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82575098 + 82575099.

It is an arithmetic number, because the mean of its divisors is an integer number (82575099).

Almost surely, 2^165150197 is an apocalyptic number.

It is an amenable number.

165150197 is a deficient number, since it is larger than the sum of its proper divisors (1).

165150197 is an equidigital number, since it uses as much as digits as its factorization.

165150197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 35.

The square root of 165150197 is about 12851.0776590915. The cubic root of 165150197 is about 548.6470293143.

The spelling of 165150197 in words is "one hundred sixty-five million, one hundred fifty thousand, one hundred ninety-seven".