168720049 has 2 divisors, whose sum is σ = 168720050. Its totient is φ = 168720048.

The previous prime is 168720029. The next prime is 168720067. The reversal of 168720049 is 940027861.

168720049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121550625 + 47169424 = 11025^2 + 6868^2 .

It is an emirp because it is prime and its reverse (940027861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168720049 - 2⁵ = 168720017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168720029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84360024 + 84360025.

It is an arithmetic number, because the mean of its divisors is an integer number (84360025).

Almost surely, 2^168720049 is an apocalyptic number.

It is an amenable number.

168720049 is a deficient number, since it is larger than the sum of its proper divisors (1).

168720049 is an equidigital number, since it uses as much as digits as its factorization.

168720049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 168720049 is about 12989.2281910820. The cubic root of 168720049 is about 552.5720294017.

It can be divided in two parts, 1687 and 20049, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 168720049 in words is "one hundred sixty-eight million, seven hundred twenty thousand, forty-nine".