164342543 has 2 divisors, whose sum is σ = 164342544. Its totient is φ = 164342542.

The previous prime is 164342539. The next prime is 164342551. The reversal of 164342543 is 345243461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164342543 - 2² = 164342539 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 (164342593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82171271 + 82171272.

It is an arithmetic number, because the mean of its divisors is an integer number (82171272).

Almost surely, 2^164342543 is an apocalyptic number.

164342543 is a deficient number, since it is larger than the sum of its proper divisors (1).

164342543 is an equidigital number, since it uses as much as digits as its factorization.

164342543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 32.

The square root of 164342543 is about 12819.6155558581. The cubic root of 164342543 is about 547.7511957283.

The spelling of 164342543 in words is "one hundred sixty-four million, three hundred forty-two thousand, five hundred forty-three".