164365287 has 4 divisors (see below), whose sum is σ = 219153720. Its totient is φ = 109576856.

The previous prime is 164365273. The next prime is 164365303. The reversal of 164365287 is 782563461.

164365287 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: 782563461 = 3 ⋅260854487.

It is a cyclic number.

It is not a de Polignac number, because 164365287 - 2¹⁴ = 164348903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164365207) 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, 27394212 + ... + 27394217.

It is an arithmetic number, because the mean of its divisors is an integer number (54788430).

Almost surely, 2^164365287 is an apocalyptic number.

164365287 is a deficient number, since it is larger than the sum of its proper divisors (54788433).

164365287 is an equidigital number, since it uses as much as digits as its factorization.

164365287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54788432.

The product of its digits is 241920, while the sum is 42.

The square root of 164365287 is about 12820.5026032523. The cubic root of 164365287 is about 547.7764630314.

The spelling of 164365287 in words is "one hundred sixty-four million, three hundred sixty-five thousand, two hundred eighty-seven".