165543047 has 2 divisors, whose sum is σ = 165543048. Its totient is φ = 165543046.

The previous prime is 165543041. The next prime is 165543073. The reversal of 165543047 is 740345561.

It is a weak prime.

It is an emirp because it is prime and its reverse (740345561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165543047 - 2⁸ = 165542791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165542998 and 165543016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165543041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82771523 + 82771524.

It is an arithmetic number, because the mean of its divisors is an integer number (82771524).

Almost surely, 2^165543047 is an apocalyptic number.

165543047 is a deficient number, since it is larger than the sum of its proper divisors (1).

165543047 is an equidigital number, since it uses as much as digits as its factorization.

165543047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 165543047 is about 12866.3532906570. The cubic root of 165543047 is about 549.0817150594.

The spelling of 165543047 in words is "one hundred sixty-five million, five hundred forty-three thousand, forty-seven".