139830877 has 2 divisors, whose sum is σ = 139830878. Its totient is φ = 139830876.

The previous prime is 139830871. The next prime is 139830893. The reversal of 139830877 is 778038931.

It is a happy number.

139830877 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 can be written as a sum of positive squares in only one way, i.e., 70375321 + 69455556 = 8389^2 + 8334^2 .

It is an emirp because it is prime and its reverse (778038931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139830877 - 2⁷ = 139830749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139830871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69915438 + 69915439.

It is an arithmetic number, because the mean of its divisors is an integer number (69915439).

Almost surely, 2^139830877 is an apocalyptic number.

It is an amenable number.

139830877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139830877 is an equidigital number, since it uses as much as digits as its factorization.

139830877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 139830877 is about 11825.0106553863. The cubic root of 139830877 is about 519.0402377962.

The spelling of 139830877 in words is "one hundred thirty-nine million, eight hundred thirty thousand, eight hundred seventy-seven".