2139280771 has 2 divisors, whose sum is σ = 2139280772. Its totient is φ = 2139280770.

The previous prime is 2139280757. The next prime is 2139280849. The reversal of 2139280771 is 1770829312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139280771 - 2¹³ = 2139272579 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139286771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069640385 + 1069640386.

It is an arithmetic number, because the mean of its divisors is an integer number (1069640386).

Almost surely, 2^2139280771 is an apocalyptic number.

2139280771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139280771 is an equidigital number, since it uses as much as digits as its factorization.

2139280771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 2139280771 is about 46252.3596262937. The cubic root of 2139280771 is about 1288.5143586493.

The spelling of 2139280771 in words is "two billion, one hundred thirty-nine million, two hundred eighty thousand, seven hundred seventy-one".