164340427 has 4 divisors (see below), whose sum is σ = 164469016. Its totient is φ = 164211840.

The previous prime is 164340403. The next prime is 164340457. The reversal of 164340427 is 724043461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724043461 = 3209 ⋅225629.

It is a cyclic number.

It is not a de Polignac number, because 164340427 - 2⁷ = 164340299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164340457) 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, 62358 + ... + 64939.

It is an arithmetic number, because the mean of its divisors is an integer number (41117254).

Almost surely, 2^164340427 is an apocalyptic number.

164340427 is a deficient number, since it is larger than the sum of its proper divisors (128589).

164340427 is a wasteful number, since it uses less digits than its factorization.

164340427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128588.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 164340427 is about 12819.5330258165. The cubic root of 164340427 is about 547.7488448529.

Adding to 164340427 its reverse (724043461), we get a palindrome (888383888).

The spelling of 164340427 in words is "one hundred sixty-four million, three hundred forty thousand, four hundred twenty-seven".