164420843 has 2 divisors, whose sum is σ = 164420844. Its totient is φ = 164420842.

The previous prime is 164420833. The next prime is 164420873. The reversal of 164420843 is 348024461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164420843 - 2¹⁴ = 164404459 is a prime.

It is a super-3 number, since 3×164420843³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164420833) 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 as a sum of consecutive naturals, namely, 82210421 + 82210422.

It is an arithmetic number, because the mean of its divisors is an integer number (82210422).

Almost surely, 2^164420843 is an apocalyptic number.

164420843 is a deficient number, since it is larger than the sum of its proper divisors (1).

164420843 is an equidigital number, since it uses as much as digits as its factorization.

164420843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 164420843 is about 12822.6691059233. The cubic root of 164420843 is about 547.8381728194.

The spelling of 164420843 in words is "one hundred sixty-four million, four hundred twenty thousand, eight hundred forty-three".