165868039 has 2 divisors, whose sum is σ = 165868040. Its totient is φ = 165868038.

The previous prime is 165868033. The next prime is 165868061. The reversal of 165868039 is 930868561.

165868039 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 is a cyclic number.

It is not a de Polignac number, because 165868039 - 2²⁵ = 132313607 is a prime.

It is a super-3 number, since 3×165868039³ (a number of 26 digits) contains 333 as substring.

It is equal to p_9284689 and since 165868039 and 9284689 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165868039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165868033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82934019 + 82934020.

It is an arithmetic number, because the mean of its divisors is an integer number (82934020).

Almost surely, 2^165868039 is an apocalyptic number.

165868039 is a deficient number, since it is larger than the sum of its proper divisors (1).

165868039 is an equidigital number, since it uses as much as digits as its factorization.

165868039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 165868039 is about 12878.9766285990. The cubic root of 165868039 is about 549.4407969218.

The spelling of 165868039 in words is "one hundred sixty-five million, eight hundred sixty-eight thousand, thirty-nine".