165178337 has 2 divisors, whose sum is σ = 165178338. Its totient is φ = 165178336.

The previous prime is 165178289. The next prime is 165178339. The reversal of 165178337 is 733871561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156975841 + 8202496 = 12529^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 165178337 - 2⁸ = 165178081 is a prime.

Together with 165178339, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 165178294 and 165178303.

It is not a weakly prime, because it can be changed into another prime (165178339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82589168 + 82589169.

It is an arithmetic number, because the mean of its divisors is an integer number (82589169).

Almost surely, 2^165178337 is an apocalyptic number.

It is an amenable number.

165178337 is a deficient number, since it is larger than the sum of its proper divisors (1).

165178337 is an equidigital number, since it uses as much as digits as its factorization.

165178337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 165178337 is about 12852.1724622727. The cubic root of 165178337 is about 548.6781889312.

The spelling of 165178337 in words is "one hundred sixty-five million, one hundred seventy-eight thousand, three hundred thirty-seven".