139348871 has 2 divisors, whose sum is σ = 139348872. Its totient is φ = 139348870.

The previous prime is 139348841. The next prime is 139348877. The reversal of 139348871 is 178843931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139348871 - 2¹⁰ = 139347847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139348877) 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, 69674435 + 69674436.

It is an arithmetic number, because the mean of its divisors is an integer number (69674436).

Almost surely, 2^139348871 is an apocalyptic number.

139348871 is a deficient number, since it is larger than the sum of its proper divisors (1).

139348871 is an equidigital number, since it uses as much as digits as its factorization.

139348871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 139348871 is about 11804.6122765638. The cubic root of 139348871 is about 518.4431628898.

The spelling of 139348871 in words is "one hundred thirty-nine million, three hundred forty-eight thousand, eight hundred seventy-one".