165257293 has 2 divisors, whose sum is σ = 165257294. Its totient is φ = 165257292.

The previous prime is 165257291. The next prime is 165257321. The reversal of 165257293 is 392752561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136118889 + 29138404 = 11667^2 + 5398^2 .

It is an emirp because it is prime and its reverse (392752561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165257293 - 2¹ = 165257291 is a prime.

Together with 165257291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165257291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82628646 + 82628647.

It is an arithmetic number, because the mean of its divisors is an integer number (82628647).

Almost surely, 2^165257293 is an apocalyptic number.

It is an amenable number.

165257293 is a deficient number, since it is larger than the sum of its proper divisors (1).

165257293 is an equidigital number, since it uses as much as digits as its factorization.

165257293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 165257293 is about 12855.2437938765. The cubic root of 165257293 is about 548.7655985659.

The spelling of 165257293 in words is "one hundred sixty-five million, two hundred fifty-seven thousand, two hundred ninety-three".