39965071 has 2 divisors, whose sum is σ = 39965072. Its totient is φ = 39965070.

The previous prime is 39965047. The next prime is 39965077. The reversal of 39965071 is 17056993.

39965071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39965071 - 2²¹ = 37867919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39965077) 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, 19982535 + 19982536.

It is an arithmetic number, because the mean of its divisors is an integer number (19982536).

Almost surely, 2^39965071 is an apocalyptic number.

39965071 is a deficient number, since it is larger than the sum of its proper divisors (1).

39965071 is an equidigital number, since it uses as much as digits as its factorization.

39965071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 39965071 is about 6321.7933373371. The cubic root of 39965071 is about 341.8956140961.

The spelling of 39965071 in words is "thirty-nine million, nine hundred sixty-five thousand, seventy-one".