164118593 has 4 divisors (see below), whose sum is σ = 171254208. Its totient is φ = 156982980.

The previous prime is 164118587. The next prime is 164118623. The reversal of 164118593 is 395811461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 395811461 = 401 ⋅987061.

It is a cyclic number.

It is not a de Polignac number, because 164118593 - 2¹⁸ = 163856449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164118553) 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, 3567773 + ... + 3567818.

It is an arithmetic number, because the mean of its divisors is an integer number (42813552).

Almost surely, 2^164118593 is an apocalyptic number.

It is an amenable number.

164118593 is a deficient number, since it is larger than the sum of its proper divisors (7135615).

164118593 is an equidigital number, since it uses as much as digits as its factorization.

164118593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7135614.

The product of its digits is 25920, while the sum is 38.

The square root of 164118593 is about 12810.8779168330. The cubic root of 164118593 is about 547.5022753115.

The spelling of 164118593 in words is "one hundred sixty-four million, one hundred eighteen thousand, five hundred ninety-three".