164569841 has 2 divisors, whose sum is σ = 164569842. Its totient is φ = 164569840.

The previous prime is 164569837. The next prime is 164569861. The reversal of 164569841 is 148965461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95746225 + 68823616 = 9785^2 + 8296^2 .

It is a cyclic number.

It is not a de Polignac number, because 164569841 - 2² = 164569837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164569792 and 164569801.

It is not a weakly prime, because it can be changed into another prime (164569861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82284920 + 82284921.

It is an arithmetic number, because the mean of its divisors is an integer number (82284921).

Almost surely, 2^164569841 is an apocalyptic number.

It is an amenable number.

164569841 is a deficient number, since it is larger than the sum of its proper divisors (1).

164569841 is an equidigital number, since it uses as much as digits as its factorization.

164569841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 164569841 is about 12828.4777351017. The cubic root of 164569841 is about 548.0036063218.

The spelling of 164569841 in words is "one hundred sixty-four million, five hundred sixty-nine thousand, eight hundred forty-one".