165938363 has 2 divisors, whose sum is σ = 165938364. Its totient is φ = 165938362.

The previous prime is 165938329. The next prime is 165938369. The reversal of 165938363 is 363839561.

It is a strong prime.

It is an emirp because it is prime and its reverse (363839561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165938363 - 2²⁰ = 164889787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165938369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82969181 + 82969182.

It is an arithmetic number, because the mean of its divisors is an integer number (82969182).

Almost surely, 2^165938363 is an apocalyptic number.

165938363 is a deficient number, since it is larger than the sum of its proper divisors (1).

165938363 is an equidigital number, since it uses as much as digits as its factorization.

165938363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 165938363 is about 12881.7065251464. The cubic root of 165938363 is about 549.5184357795.

The spelling of 165938363 in words is "one hundred sixty-five million, nine hundred thirty-eight thousand, three hundred sixty-three".