39939271 has 2 divisors, whose sum is σ = 39939272. Its totient is φ = 39939270.

The previous prime is 39939269. The next prime is 39939281. The reversal of 39939271 is 17293993.

39939271 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 a cyclic number.

It is not a de Polignac number, because 39939271 - 2¹ = 39939269 is a prime.

It is a super-2 number, since 2×39939271² = 3190290736022882, which contains 22 as substring.

Together with 39939269, 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 (39939281) 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, 19969635 + 19969636.

It is an arithmetic number, because the mean of its divisors is an integer number (19969636).

Almost surely, 2^39939271 is an apocalyptic number.

39939271 is a deficient number, since it is larger than the sum of its proper divisors (1).

39939271 is an equidigital number, since it uses as much as digits as its factorization.

39939271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 39939271 is about 6319.7524476834. The cubic root of 39939271 is about 341.8220264569.

The spelling of 39939271 in words is "thirty-nine million, nine hundred thirty-nine thousand, two hundred seventy-one".