165188741 has 2 divisors, whose sum is σ = 165188742. Its totient is φ = 165188740.

The previous prime is 165188729. The next prime is 165188743. The reversal of 165188741 is 147881561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135256900 + 29931841 = 11630^2 + 5471^2 .

It is an emirp because it is prime and its reverse (147881561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165188741 - 2¹⁰ = 165187717 is a prime.

Together with 165188743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165188743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82594370 + 82594371.

It is an arithmetic number, because the mean of its divisors is an integer number (82594371).

Almost surely, 2^165188741 is an apocalyptic number.

It is an amenable number.

165188741 is a deficient number, since it is larger than the sum of its proper divisors (1).

165188741 is an equidigital number, since it uses as much as digits as its factorization.

165188741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 41.

The square root of 165188741 is about 12852.5772123726. The cubic root of 165188741 is about 548.6897084563.

The spelling of 165188741 in words is "one hundred sixty-five million, one hundred eighty-eight thousand, seven hundred forty-one".