165939133 has 2 divisors, whose sum is σ = 165939134. Its totient is φ = 165939132.

The previous prime is 165939127. The next prime is 165939139. The reversal of 165939133 is 331939561.

It is a balanced prime because it is at equal distance from previous prime (165939127) and next prime (165939139).

It can be written as a sum of positive squares in only one way, i.e., 119180889 + 46758244 = 10917^2 + 6838^2 .

It is an emirp because it is prime and its reverse (331939561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165939133 - 2²¹ = 163841981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165939139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82969566 + 82969567.

It is an arithmetic number, because the mean of its divisors is an integer number (82969567).

Almost surely, 2^165939133 is an apocalyptic number.

It is an amenable number.

165939133 is a deficient number, since it is larger than the sum of its proper divisors (1).

165939133 is an equidigital number, since it uses as much as digits as its factorization.

165939133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 40.

The square root of 165939133 is about 12881.7364124562. The cubic root of 165939133 is about 549.5192857508.

The spelling of 165939133 in words is "one hundred sixty-five million, nine hundred thirty-nine thousand, one hundred thirty-three".