168156073 has 2 divisors, whose sum is σ = 168156074. Its totient is φ = 168156072.

The previous prime is 168156071. The next prime is 168156089. The reversal of 168156073 is 370651861.

168156073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152695449 + 15460624 = 12357^2 + 3932^2 .

It is an emirp because it is prime and its reverse (370651861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168156073 - 2¹ = 168156071 is a prime.

Together with 168156071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168156071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84078036 + 84078037.

It is an arithmetic number, because the mean of its divisors is an integer number (84078037).

Almost surely, 2^168156073 is an apocalyptic number.

It is an amenable number.

168156073 is a deficient number, since it is larger than the sum of its proper divisors (1).

168156073 is an equidigital number, since it uses as much as digits as its factorization.

168156073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 168156073 is about 12967.5006458454. The cubic root of 168156073 is about 551.9556528558.

The spelling of 168156073 in words is "one hundred sixty-eight million, one hundred fifty-six thousand, seventy-three".