165214393 has 2 divisors, whose sum is σ = 165214394. Its totient is φ = 165214392.

The previous prime is 165214391. The next prime is 165214411. The reversal of 165214393 is 393412561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140493609 + 24720784 = 11853^2 + 4972^2 .

It is an emirp because it is prime and its reverse (393412561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165214393 - 2¹ = 165214391 is a prime.

Together with 165214391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (165214391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82607196 + 82607197.

It is an arithmetic number, because the mean of its divisors is an integer number (82607197).

Almost surely, 2^165214393 is an apocalyptic number.

It is an amenable number.

165214393 is a deficient number, since it is larger than the sum of its proper divisors (1).

165214393 is an equidigital number, since it uses as much as digits as its factorization.

165214393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 165214393 is about 12853.5751057828. The cubic root of 165214393 is about 548.7181088179.

The spelling of 165214393 in words is "one hundred sixty-five million, two hundred fourteen thousand, three hundred ninety-three".