164214643 has 2 divisors, whose sum is σ = 164214644. Its totient is φ = 164214642.

The previous prime is 164214613. The next prime is 164214649. The reversal of 164214643 is 346412461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164214643 is a prime.

It is not a weakly prime, because it can be changed into another prime (164214649) 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, 82107321 + 82107322.

It is an arithmetic number, because the mean of its divisors is an integer number (82107322).

Almost surely, 2^164214643 is an apocalyptic number.

164214643 is a deficient number, since it is larger than the sum of its proper divisors (1).

164214643 is an equidigital number, since it uses as much as digits as its factorization.

164214643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 164214643 is about 12814.6261357872. The cubic root of 164214643 is about 547.6090625986.

The spelling of 164214643 in words is "one hundred sixty-four million, two hundred fourteen thousand, six hundred forty-three".