165693139 has 2 divisors, whose sum is σ = 165693140. Its totient is φ = 165693138.

The previous prime is 165693133. The next prime is 165693161. The reversal of 165693139 is 931396561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165693139 - 2⁵ = 165693107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165693095 and 165693104.

It is not a weakly prime, because it can be changed into another prime (165693133) 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, 82846569 + 82846570.

It is an arithmetic number, because the mean of its divisors is an integer number (82846570).

Almost surely, 2^165693139 is an apocalyptic number.

165693139 is a deficient number, since it is larger than the sum of its proper divisors (1).

165693139 is an equidigital number, since it uses as much as digits as its factorization.

165693139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 43.

The square root of 165693139 is about 12872.1847019067. The cubic root of 165693139 is about 549.2476092279.

The spelling of 165693139 in words is "one hundred sixty-five million, six hundred ninety-three thousand, one hundred thirty-nine".