165600137 has 2 divisors, whose sum is σ = 165600138. Its totient is φ = 165600136.

The previous prime is 165600133. The next prime is 165600163. The reversal of 165600137 is 731006561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136913401 + 28686736 = 11701^2 + 5356^2 .

It is a cyclic number.

It is not a de Polignac number, because 165600137 - 2² = 165600133 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165600131) 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, 82800068 + 82800069.

It is an arithmetic number, because the mean of its divisors is an integer number (82800069).

Almost surely, 2^165600137 is an apocalyptic number.

It is an amenable number.

165600137 is a deficient number, since it is larger than the sum of its proper divisors (1).

165600137 is an equidigital number, since it uses as much as digits as its factorization.

165600137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 165600137 is about 12868.5716767635. The cubic root of 165600137 is about 549.1448274902.

Adding to 165600137 its reverse (731006561), we get a palindrome (896606698).

The spelling of 165600137 in words is "one hundred sixty-five million, six hundred thousand, one hundred thirty-seven".