164171543 has 2 divisors, whose sum is σ = 164171544. Its totient is φ = 164171542.

The previous prime is 164171537. The next prime is 164171551. The reversal of 164171543 is 345171461.

164171543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164171543 - 2¹⁸ = 163909399 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164171563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82085771 + 82085772.

It is an arithmetic number, because the mean of its divisors is an integer number (82085772).

Almost surely, 2^164171543 is an apocalyptic number.

164171543 is a deficient number, since it is larger than the sum of its proper divisors (1).

164171543 is an equidigital number, since it uses as much as digits as its factorization.

164171543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 164171543 is about 12812.9443532703. The cubic root of 164171543 is about 547.5611496652.

The spelling of 164171543 in words is "one hundred sixty-four million, one hundred seventy-one thousand, five hundred forty-three".