165072239 has 2 divisors, whose sum is σ = 165072240. Its totient is φ = 165072238.

The previous prime is 165072211. The next prime is 165072253. The reversal of 165072239 is 932270561.

It is a strong prime.

It is an emirp because it is prime and its reverse (932270561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165072239 - 2¹⁶ = 165006703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165072199 and 165072208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165072139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82536119 + 82536120.

It is an arithmetic number, because the mean of its divisors is an integer number (82536120).

Almost surely, 2^165072239 is an apocalyptic number.

165072239 is a deficient number, since it is larger than the sum of its proper divisors (1).

165072239 is an equidigital number, since it uses as much as digits as its factorization.

165072239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 165072239 is about 12848.0441702230. The cubic root of 165072239 is about 548.5606873911.

The spelling of 165072239 in words is "one hundred sixty-five million, seventy-two thousand, two hundred thirty-nine".