164328247 has 4 divisors (see below), whose sum is σ = 164358040. Its totient is φ = 164298456.

The previous prime is 164328233. The next prime is 164328253. The reversal of 164328247 is 742823461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742823461 = 53 ⋅14015537.

It is a cyclic number.

It is not a de Polignac number, because 164328247 - 2²³ = 155939639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164328217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3933 + ... + 18550.

It is an arithmetic number, because the mean of its divisors is an integer number (41089510).

Almost surely, 2^164328247 is an apocalyptic number.

164328247 is a deficient number, since it is larger than the sum of its proper divisors (29793).

164328247 is an equidigital number, since it uses as much as digits as its factorization.

164328247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29792.

The product of its digits is 64512, while the sum is 37.

The square root of 164328247 is about 12819.0579607083. The cubic root of 164328247 is about 547.7353124842.

It can be divided in two parts, 1643 and 28247, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 164328247 in words is "one hundred sixty-four million, three hundred twenty-eight thousand, two hundred forty-seven".