165039011 has 2 divisors, whose sum is σ = 165039012. Its totient is φ = 165039010.

The previous prime is 165038987. The next prime is 165039013. The reversal of 165039011 is 110930561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165039011 - 2¹⁰ = 165037987 is a prime.

Together with 165039013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165039013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82519505 + 82519506.

It is an arithmetic number, because the mean of its divisors is an integer number (82519506).

Almost surely, 2^165039011 is an apocalyptic number.

165039011 is a deficient number, since it is larger than the sum of its proper divisors (1).

165039011 is an equidigital number, since it uses as much as digits as its factorization.

165039011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 165039011 is about 12846.7509900364. The cubic root of 165039011 is about 548.5238776529.

Adding to 165039011 its reverse (110930561), we get a palindrome (275969572).

The spelling of 165039011 in words is "one hundred sixty-five million, thirty-nine thousand, eleven".