39998071 has 2 divisors, whose sum is σ = 39998072. Its totient is φ = 39998070.

The previous prime is 39998069. The next prime is 39998111. The reversal of 39998071 is 17089993.

39998071 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 is an emirp because it is prime and its reverse (17089993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39998071 - 2¹ = 39998069 is a prime.

Together with 39998069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39998051) 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, 19999035 + 19999036.

It is an arithmetic number, because the mean of its divisors is an integer number (19999036).

Almost surely, 2^39998071 is an apocalyptic number.

39998071 is a deficient number, since it is larger than the sum of its proper divisors (1).

39998071 is an equidigital number, since it uses as much as digits as its factorization.

39998071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 39998071 is about 6324.4028176580. The cubic root of 39998071 is about 341.9896916743.

The spelling of 39998071 in words is "thirty-nine million, nine hundred ninety-eight thousand, seventy-one".