165128863 has 2 divisors, whose sum is σ = 165128864. Its totient is φ = 165128862.

The previous prime is 165128861. The next prime is 165128903. The reversal of 165128863 is 368821561.

It is an a-pointer prime, because the next prime (165128903) can be obtained adding 165128863 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (368821561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165128863 - 2¹ = 165128861 is a prime.

Together with 165128861, it forms a pair of twin primes.

It is equal to p_9245758 and since 165128863 and 9245758 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165128861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82564431 + 82564432.

It is an arithmetic number, because the mean of its divisors is an integer number (82564432).

Almost surely, 2^165128863 is an apocalyptic number.

165128863 is a deficient number, since it is larger than the sum of its proper divisors (1).

165128863 is an equidigital number, since it uses as much as digits as its factorization.

165128863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 165128863 is about 12850.2475851635. The cubic root of 165128863 is about 548.6234036693.

The spelling of 165128863 in words is "one hundred sixty-five million, one hundred twenty-eight thousand, eight hundred sixty-three".