2139049577389 has 2 divisors, whose sum is σ = 2139049577390. Its totient is φ = 2139049577388.

The previous prime is 2139049577369. The next prime is 2139049577411. The reversal of 2139049577389 is 9837759409312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2139029101764 + 20475625 = 1462542^2 + 4525^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139049577389 - 2⁷ = 2139049577261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139049577369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069524788694 + 1069524788695.

It is an arithmetic number, because the mean of its divisors is an integer number (1069524788695).

Almost surely, 2^{2139049577389} is an apocalyptic number.

It is an amenable number.

2139049577389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139049577389 is an equidigital number, since it uses as much as digits as its factorization.

2139049577389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102876480, while the sum is 67.

The spelling of 2139049577389 in words is "two trillion, one hundred thirty-nine billion, forty-nine million, five hundred seventy-seven thousand, three hundred eighty-nine".