165356923 has 2 divisors, whose sum is σ = 165356924. Its totient is φ = 165356922.

The previous prime is 165356911. The next prime is 165356963. The reversal of 165356923 is 329653561.

It is a happy number.

It is an a-pointer prime, because the next prime (165356963) can be obtained adding 165356923 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (329653561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165356923 - 2¹³ = 165348731 is a prime.

It is not a weakly prime, because it can be changed into another prime (165356903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82678461 + 82678462.

It is an arithmetic number, because the mean of its divisors is an integer number (82678462).

Almost surely, 2^165356923 is an apocalyptic number.

165356923 is a deficient number, since it is larger than the sum of its proper divisors (1).

165356923 is an equidigital number, since it uses as much as digits as its factorization.

165356923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 40.

The square root of 165356923 is about 12859.1182823707. The cubic root of 165356923 is about 548.8758559956.

The spelling of 165356923 in words is "one hundred sixty-five million, three hundred fifty-six thousand, nine hundred twenty-three".