165163291 has 2 divisors, whose sum is σ = 165163292. Its totient is φ = 165163290.

The previous prime is 165163289. The next prime is 165163307. The reversal of 165163291 is 192361561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165163291 - 2¹ = 165163289 is a prime.

Together with 165163289, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (165163591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82581645 + 82581646.

It is an arithmetic number, because the mean of its divisors is an integer number (82581646).

Almost surely, 2^165163291 is an apocalyptic number.

165163291 is a deficient number, since it is larger than the sum of its proper divisors (1).

165163291 is an equidigital number, since it uses as much as digits as its factorization.

165163291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 165163291 is about 12851.5871004324. The cubic root of 165163291 is about 548.6615288314.

The spelling of 165163291 in words is "one hundred sixty-five million, one hundred sixty-three thousand, two hundred ninety-one".