165943301 has 2 divisors, whose sum is σ = 165943302. Its totient is φ = 165943300.

The previous prime is 165943243. The next prime is 165943319. The reversal of 165943301 is 103349561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160630276 + 5313025 = 12674^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 165943301 - 2¹⁰ = 165942277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165943331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82971650 + 82971651.

It is an arithmetic number, because the mean of its divisors is an integer number (82971651).

Almost surely, 2^165943301 is an apocalyptic number.

It is an amenable number.

165943301 is a deficient number, since it is larger than the sum of its proper divisors (1).

165943301 is an equidigital number, since it uses as much as digits as its factorization.

165943301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 165943301 is about 12881.8981908723. The cubic root of 165943301 is about 549.5238865888.

The spelling of 165943301 in words is "one hundred sixty-five million, nine hundred forty-three thousand, three hundred one".