165340393 has 2 divisors, whose sum is σ = 165340394. Its totient is φ = 165340392.

The previous prime is 165340387. The next prime is 165340421. The reversal of 165340393 is 393043561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159971904 + 5368489 = 12648^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 165340393 - 2²⁵ = 131785961 is a prime.

It is not a weakly prime, because it can be changed into another prime (165340303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82670196 + 82670197.

It is an arithmetic number, because the mean of its divisors is an integer number (82670197).

Almost surely, 2^165340393 is an apocalyptic number.

It is an amenable number.

165340393 is a deficient number, since it is larger than the sum of its proper divisors (1).

165340393 is an equidigital number, since it uses as much as digits as its factorization.

165340393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 165340393 is about 12858.4755317261. The cubic root of 165340393 is about 548.8575658225.

The spelling of 165340393 in words is "one hundred sixty-five million, three hundred forty thousand, three hundred ninety-three".