165253939 has 2 divisors, whose sum is σ = 165253940. Its totient is φ = 165253938.

The previous prime is 165253937. The next prime is 165253967. The reversal of 165253939 is 939352561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165253939 - 2¹ = 165253937 is a prime.

Together with 165253937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 165253895 and 165253904.

It is not a weakly prime, because it can be changed into another prime (165253931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82626969 + 82626970.

It is an arithmetic number, because the mean of its divisors is an integer number (82626970).

Almost surely, 2^165253939 is an apocalyptic number.

165253939 is a deficient number, since it is larger than the sum of its proper divisors (1).

165253939 is an equidigital number, since it uses as much as digits as its factorization.

165253939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 218700, while the sum is 43.

The square root of 165253939 is about 12855.1133406128. The cubic root of 165253939 is about 548.7618860272.

The spelling of 165253939 in words is "one hundred sixty-five million, two hundred fifty-three thousand, nine hundred thirty-nine".