165198139 has 2 divisors, whose sum is σ = 165198140. Its totient is φ = 165198138.

The previous prime is 165198133. The next prime is 165198149. The reversal of 165198139 is 931891561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165198139 - 2⁵ = 165198107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165198095 and 165198104.

It is not a weakly prime, because it can be changed into another prime (165198133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82599069 + 82599070.

It is an arithmetic number, because the mean of its divisors is an integer number (82599070).

Almost surely, 2^165198139 is an apocalyptic number.

165198139 is a deficient number, since it is larger than the sum of its proper divisors (1).

165198139 is an equidigital number, since it uses as much as digits as its factorization.

165198139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 165198139 is about 12852.9428147798. The cubic root of 165198139 is about 548.7001137016.

The spelling of 165198139 in words is "one hundred sixty-five million, one hundred ninety-eight thousand, one hundred thirty-nine".