165942529 has 2 divisors, whose sum is σ = 165942530. Its totient is φ = 165942528.

The previous prime is 165942463. The next prime is 165942533. The reversal of 165942529 is 925249561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151954929 + 13987600 = 12327^2 + 3740^2 .

It is an emirp because it is prime and its reverse (925249561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165942529 - 2¹³ = 165934337 is a prime.

It is not a weakly prime, because it can be changed into another prime (165940529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82971264 + 82971265.

It is an arithmetic number, because the mean of its divisors is an integer number (82971265).

Almost surely, 2^165942529 is an apocalyptic number.

It is an amenable number.

165942529 is a deficient number, since it is larger than the sum of its proper divisors (1).

165942529 is an equidigital number, since it uses as much as digits as its factorization.

165942529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 43.

The square root of 165942529 is about 12881.8682263094. The cubic root of 165942529 is about 549.5230344241.

The spelling of 165942529 in words is "one hundred sixty-five million, nine hundred forty-two thousand, five hundred twenty-nine".