106809281 has 2 divisors, whose sum is σ = 106809282. Its totient is φ = 106809280.

The previous prime is 106809271. The next prime is 106809299. The reversal of 106809281 is 182908601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 33535681 = 8560^2 + 5791^2 .

It is a cyclic number.

It is not a de Polignac number, because 106809281 - 2¹⁴ = 106792897 is a prime.

It is a super-2 number, since 2×106809281² = 22816445015473922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (106809211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53404640 + 53404641.

It is an arithmetic number, because the mean of its divisors is an integer number (53404641).

Almost surely, 2^106809281 is an apocalyptic number.

It is an amenable number.

106809281 is a deficient number, since it is larger than the sum of its proper divisors (1).

106809281 is an equidigital number, since it uses as much as digits as its factorization.

106809281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 106809281 is about 10334.8575703780. The cubic root of 106809281 is about 474.4637064582.

The spelling of 106809281 in words is "one hundred six million, eight hundred nine thousand, two hundred eighty-one".