164839723 has 2 divisors, whose sum is σ = 164839724. Its totient is φ = 164839722.

The previous prime is 164839709. The next prime is 164839729. The reversal of 164839723 is 327938461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164839723 - 2⁹ = 164839211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164839723.

It is not a weakly prime, because it can be changed into another prime (164839729) 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, 82419861 + 82419862.

It is an arithmetic number, because the mean of its divisors is an integer number (82419862).

Almost surely, 2^164839723 is an apocalyptic number.

164839723 is a deficient number, since it is larger than the sum of its proper divisors (1).

164839723 is an equidigital number, since it uses as much as digits as its factorization.

164839723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 164839723 is about 12838.9922891168. The cubic root of 164839723 is about 548.3030041048.

The spelling of 164839723 in words is "one hundred sixty-four million, eight hundred thirty-nine thousand, seven hundred twenty-three".