165936943 has 2 divisors, whose sum is σ = 165936944. Its totient is φ = 165936942.

The previous prime is 165936919. The next prime is 165936977. The reversal of 165936943 is 349639561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165936943 - 2²⁵ = 132382511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165936893 and 165936902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165937943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82968471 + 82968472.

It is an arithmetic number, because the mean of its divisors is an integer number (82968472).

Almost surely, 2^165936943 is an apocalyptic number.

165936943 is a deficient number, since it is larger than the sum of its proper divisors (1).

165936943 is an equidigital number, since it uses as much as digits as its factorization.

165936943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 46.

The square root of 165936943 is about 12881.6514081076. The cubic root of 165936943 is about 549.5168682931.

The spelling of 165936943 in words is "one hundred sixty-five million, nine hundred thirty-six thousand, nine hundred forty-three".