164323243 has 4 divisors (see below), whose sum is σ = 187798000. Its totient is φ = 140848488.

The previous prime is 164323231. The next prime is 164323273. The reversal of 164323243 is 342323461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342323461 = 733 ⋅467017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164323243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164323273) 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, 11737368 + ... + 11737381.

It is an arithmetic number, because the mean of its divisors is an integer number (46949500).

Almost surely, 2^164323243 is an apocalyptic number.

164323243 is a deficient number, since it is larger than the sum of its proper divisors (23474757).

164323243 is an equidigital number, since it uses as much as digits as its factorization.

164323243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23474756.

The product of its digits is 10368, while the sum is 28.

The square root of 164323243 is about 12818.8627810738. The cubic root of 164323243 is about 547.7297526867.

The spelling of 164323243 in words is "one hundred sixty-four million, three hundred twenty-three thousand, two hundred forty-three".