165405353 has 2 divisors, whose sum is σ = 165405354. Its totient is φ = 165405352.

The previous prime is 165405319. The next prime is 165405403. The reversal of 165405353 is 353504561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159466384 + 5938969 = 12628^2 + 2437^2 .

It is a cyclic number.

It is not a de Polignac number, because 165405353 - 2²⁶ = 98296489 is a prime.

It is not a weakly prime, because it can be changed into another prime (165405313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82702676 + 82702677.

It is an arithmetic number, because the mean of its divisors is an integer number (82702677).

Almost surely, 2^165405353 is an apocalyptic number.

It is an amenable number.

165405353 is a deficient number, since it is larger than the sum of its proper divisors (1).

165405353 is an equidigital number, since it uses as much as digits as its factorization.

165405353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 165405353 is about 12861.0012440712. The cubic root of 165405353 is about 548.9294359778.

Subtracting from 165405353 its sum of digits (32), we obtain a square (165405321 = 12861²).

The spelling of 165405353 in words is "one hundred sixty-five million, four hundred five thousand, three hundred fifty-three".