164442149 has 2 divisors, whose sum is σ = 164442150. Its totient is φ = 164442148.

The previous prime is 164442127. The next prime is 164442163. The reversal of 164442149 is 941244461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 44649124 = 10945^2 + 6682^2 .

It is a cyclic number.

It is not a de Polignac number, because 164442149 - 2¹⁶ = 164376613 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164441149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82221074 + 82221075.

It is an arithmetic number, because the mean of its divisors is an integer number (82221075).

Almost surely, 2^164442149 is an apocalyptic number.

It is an amenable number.

164442149 is a deficient number, since it is larger than the sum of its proper divisors (1).

164442149 is an equidigital number, since it uses as much as digits as its factorization.

164442149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 164442149 is about 12823.4998732795. The cubic root of 164442149 is about 547.8618351398.

The spelling of 164442149 in words is "one hundred sixty-four million, four hundred forty-two thousand, one hundred forty-nine".