168872029 has 2 divisors, whose sum is σ = 168872030. Its totient is φ = 168872028.

The previous prime is 168872021. The next prime is 168872063. The reversal of 168872029 is 920278861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86025625 + 82846404 = 9275^2 + 9102^2 .

It is an emirp because it is prime and its reverse (920278861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168872029 - 2³ = 168872021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168872021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84436014 + 84436015.

It is an arithmetic number, because the mean of its divisors is an integer number (84436015).

Almost surely, 2^168872029 is an apocalyptic number.

It is an amenable number.

168872029 is a deficient number, since it is larger than the sum of its proper divisors (1).

168872029 is an equidigital number, since it uses as much as digits as its factorization.

168872029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 168872029 is about 12995.0771063507. The cubic root of 168872029 is about 552.7378952729.

The spelling of 168872029 in words is "one hundred sixty-eight million, eight hundred seventy-two thousand, twenty-nine".