168427639 has 2 divisors, whose sum is σ = 168427640. Its totient is φ = 168427638.

The previous prime is 168427601. The next prime is 168427657. The reversal of 168427639 is 936724861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168427639 - 2¹⁵ = 168394871 is a prime.

It is a super-3 number, since 3×168427639³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168427339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84213819 + 84213820.

It is an arithmetic number, because the mean of its divisors is an integer number (84213820).

Almost surely, 2^168427639 is an apocalyptic number.

168427639 is a deficient number, since it is larger than the sum of its proper divisors (1).

168427639 is an equidigital number, since it uses as much as digits as its factorization.

168427639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 168427639 is about 12977.9674448659. The cubic root of 168427639 is about 552.2526225463.

The spelling of 168427639 in words is "one hundred sixty-eight million, four hundred twenty-seven thousand, six hundred thirty-nine".