139285277 has 2 divisors, whose sum is σ = 139285278. Its totient is φ = 139285276.

The previous prime is 139285273. The next prime is 139285283. The reversal of 139285277 is 772582931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91661476 + 47623801 = 9574^2 + 6901^2 .

It is an emirp because it is prime and its reverse (772582931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139285277 - 2² = 139285273 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139285271) 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, 69642638 + 69642639.

It is an arithmetic number, because the mean of its divisors is an integer number (69642639).

Almost surely, 2^139285277 is an apocalyptic number.

It is an amenable number.

139285277 is a deficient number, since it is larger than the sum of its proper divisors (1).

139285277 is an equidigital number, since it uses as much as digits as its factorization.

139285277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 139285277 is about 11801.9183610123. The cubic root of 139285277 is about 518.3642843863.

The spelling of 139285277 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, two hundred seventy-seven".