168520039 has 2 divisors, whose sum is σ = 168520040. Its totient is φ = 168520038.

The previous prime is 168520013. The next prime is 168520049. The reversal of 168520039 is 930025861.

168520039 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 is a cyclic number.

It is not a de Polignac number, because 168520039 - 2⁵ = 168520007 is a prime.

It is equal to p_9424852 and since 168520039 and 9424852 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 168519986 and 168520013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168520049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84260019 + 84260020.

It is an arithmetic number, because the mean of its divisors is an integer number (84260020).

Almost surely, 2^168520039 is an apocalyptic number.

168520039 is a deficient number, since it is larger than the sum of its proper divisors (1).

168520039 is an equidigital number, since it uses as much as digits as its factorization.

168520039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 168520039 is about 12981.5268362393. The cubic root of 168520039 is about 552.3535933332.

The spelling of 168520039 in words is "one hundred sixty-eight million, five hundred twenty thousand, thirty-nine".