165293393 has 4 divisors (see below), whose sum is σ = 169760820. Its totient is φ = 160825968.

The previous prime is 165293383. The next prime is 165293423. The reversal of 165293393 is 393392561.

165293393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393392561 = 8719 ⋅45119.

It can be written as a sum of positive squares in 2 ways, for example, as 84419344 + 80874049 = 9188^2 + 8993^2 .

It is a cyclic number.

It is not a de Polignac number, because 165293393 - 2¹⁸ = 165031249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165293393.

It is not an unprimeable number, because it can be changed into a prime (165293383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2233658 + ... + 2233731.

It is an arithmetic number, because the mean of its divisors is an integer number (42440205).

Almost surely, 2^165293393 is an apocalyptic number.

It is an amenable number.

165293393 is a deficient number, since it is larger than the sum of its proper divisors (4467427).

165293393 is an equidigital number, since it uses as much as digits as its factorization.

165293393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467426.

The product of its digits is 131220, while the sum is 41.

The square root of 165293393 is about 12856.6478134854. The cubic root of 165293393 is about 548.8055544339.

The spelling of 165293393 in words is "one hundred sixty-five million, two hundred ninety-three thousand, three hundred ninety-three".