164305861 has 2 divisors, whose sum is σ = 164305862. Its totient is φ = 164305860.

The previous prime is 164305811. The next prime is 164305873. The reversal of 164305861 is 168503461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86601636 + 77704225 = 9306^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 164305861 - 2⁷ = 164305733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164305811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82152930 + 82152931.

It is an arithmetic number, because the mean of its divisors is an integer number (82152931).

Almost surely, 2^164305861 is an apocalyptic number.

It is an amenable number.

164305861 is a deficient number, since it is larger than the sum of its proper divisors (1).

164305861 is an equidigital number, since it uses as much as digits as its factorization.

164305861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 164305861 is about 12818.1847778849. The cubic root of 164305861 is about 547.7104391798.

The spelling of 164305861 in words is "one hundred sixty-four million, three hundred five thousand, eight hundred sixty-one".