168623933 has 2 divisors, whose sum is σ = 168623934. Its totient is φ = 168623932.

The previous prime is 168623929. The next prime is 168623953. The reversal of 168623933 is 339326861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154206724 + 14417209 = 12418^2 + 3797^2 .

It is an emirp because it is prime and its reverse (339326861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168623933 - 2² = 168623929 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168623953) 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, 84311966 + 84311967.

It is an arithmetic number, because the mean of its divisors is an integer number (84311967).

Almost surely, 2^168623933 is an apocalyptic number.

It is an amenable number.

168623933 is a deficient number, since it is larger than the sum of its proper divisors (1).

168623933 is an equidigital number, since it uses as much as digits as its factorization.

168623933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 168623933 is about 12985.5278290873. The cubic root of 168623933 is about 552.4670802031.

The spelling of 168623933 in words is "one hundred sixty-eight million, six hundred twenty-three thousand, nine hundred thirty-three".