39605081 has 2 divisors, whose sum is σ = 39605082. Its totient is φ = 39605080.

The previous prime is 39605047. The next prime is 39605119. The reversal of 39605081 is 18050693.

39605081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29333056 + 10272025 = 5416^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 39605081 - 2⁶ = 39605017 is a prime.

It is a super-2 number, since 2×39605081² = 3137124882033122, 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 (39605981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19802540 + 19802541.

It is an arithmetic number, because the mean of its divisors is an integer number (19802541).

Almost surely, 2^39605081 is an apocalyptic number.

It is an amenable number.

39605081 is a deficient number, since it is larger than the sum of its proper divisors (1).

39605081 is an equidigital number, since it uses as much as digits as its factorization.

39605081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 39605081 is about 6293.2567880232. The cubic root of 39605081 is about 340.8659615439.

The spelling of 39605081 in words is "thirty-nine million, six hundred five thousand, eighty-one".