164365247 has 4 divisors (see below), whose sum is σ = 164390976. Its totient is φ = 164339520.

The previous prime is 164365217. The next prime is 164365259. The reversal of 164365247 is 742563461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 742563461 = 349 ⋅2127689.

It is a cyclic number.

It is not a de Polignac number, because 164365247 - 2¹⁰ = 164364223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164365247.

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, 4847 + ... + 18767.

It is an arithmetic number, because the mean of its divisors is an integer number (41097744).

Almost surely, 2^164365247 is an apocalyptic number.

164365247 is a deficient number, since it is larger than the sum of its proper divisors (25729).

164365247 is a wasteful number, since it uses less digits than its factorization.

164365247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25728.

The product of its digits is 120960, while the sum is 38.

The square root of 164365247 is about 12820.5010432510. The cubic root of 164365247 is about 547.7764185957.

The spelling of 164365247 in words is "one hundred sixty-four million, three hundred sixty-five thousand, two hundred forty-seven".