139347877 has 2 divisors, whose sum is σ = 139347878. Its totient is φ = 139347876.

The previous prime is 139347847. The next prime is 139347931. The reversal of 139347877 is 778743931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138627076 + 720801 = 11774^2 + 849^2 .

It is a cyclic number.

It is not a de Polignac number, because 139347877 - 2⁷ = 139347749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139347877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139347847) 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, 69673938 + 69673939.

It is an arithmetic number, because the mean of its divisors is an integer number (69673939).

Almost surely, 2^139347877 is an apocalyptic number.

It is an amenable number.

139347877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139347877 is an equidigital number, since it uses as much as digits as its factorization.

139347877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 139347877 is about 11804.5701743011. The cubic root of 139347877 is about 518.4419301714.

The spelling of 139347877 in words is "one hundred thirty-nine million, three hundred forty-seven thousand, eight hundred seventy-seven".