139386271 has 2 divisors, whose sum is σ = 139386272. Its totient is φ = 139386270.

The previous prime is 139386251. The next prime is 139386283. The reversal of 139386271 is 172683931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139386271 - 2¹³ = 139378079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139386211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69693135 + 69693136.

It is an arithmetic number, because the mean of its divisors is an integer number (69693136).

Almost surely, 2^139386271 is an apocalyptic number.

139386271 is a deficient number, since it is larger than the sum of its proper divisors (1).

139386271 is an equidigital number, since it uses as much as digits as its factorization.

139386271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 139386271 is about 11806.1962968604. The cubic root of 139386271 is about 518.4895405885.

The spelling of 139386271 in words is "one hundred thirty-nine million, three hundred eighty-six thousand, two hundred seventy-one".