164814243 has 32 divisors (see below), whose sum is σ = 247553280. Its totient is φ = 96658560.

The previous prime is 164814241. The next prime is 164814257. The reversal of 164814243 is 342418461.

It is a Cunningham number, because it is equal to 12838²-1.

It is not a de Polignac number, because 164814243 - 2¹ = 164814241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (164814241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423493 + ... + 423881.

It is an arithmetic number, because the mean of its divisors is an integer number (7736040).

Almost surely, 2^164814243 is an apocalyptic number.

164814243 is a deficient number, since it is larger than the sum of its proper divisors (82739037).

164814243 is a wasteful number, since it uses less digits than its factorization.

164814243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 18432, while the sum is 33.

The square root of 164814243 is about 12837.9999610531. Note that the first 4 decimals coincide. The cubic root of 164814243 is about 548.2747514479.

The spelling of 164814243 in words is "one hundred sixty-four million, eight hundred fourteen thousand, two hundred forty-three".