164840723 has 2 divisors, whose sum is σ = 164840724. Its totient is φ = 164840722.

The previous prime is 164840717. The next prime is 164840777. The reversal of 164840723 is 327048461.

It is a weak prime.

It is an emirp because it is prime and its reverse (327048461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164840723 - 2⁶ = 164840659 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (164840783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82420361 + 82420362.

It is an arithmetic number, because the mean of its divisors is an integer number (82420362).

Almost surely, 2^164840723 is an apocalyptic number.

164840723 is a deficient number, since it is larger than the sum of its proper divisors (1).

164840723 is an equidigital number, since it uses as much as digits as its factorization.

164840723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 164840723 is about 12839.0312329241. The cubic root of 164840723 is about 548.3041128625.

The spelling of 164840723 in words is "one hundred sixty-four million, eight hundred forty thousand, seven hundred twenty-three".