139342771 has 2 divisors, whose sum is σ = 139342772. Its totient is φ = 139342770.

The previous prime is 139342759. The next prime is 139342811. The reversal of 139342771 is 177243931.

It is a happy number.

139342771 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 (177243931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139342771 - 2¹¹ = 139340723 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139342771.

It is not a weakly prime, because it can be changed into another prime (139342741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69671385 + 69671386.

It is an arithmetic number, because the mean of its divisors is an integer number (69671386).

Almost surely, 2^139342771 is an apocalyptic number.

139342771 is a deficient number, since it is larger than the sum of its proper divisors (1).

139342771 is an equidigital number, since it uses as much as digits as its factorization.

139342771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 139342771 is about 11804.3539001506. The cubic root of 139342771 is about 518.4355978256.

The spelling of 139342771 in words is "one hundred thirty-nine million, three hundred forty-two thousand, seven hundred seventy-one".