2139705877 has 8 divisors (see below), whose sum is σ = 2180957400. Its totient is φ = 2098487040.

The previous prime is 2139705863. The next prime is 2139705941. The reversal of 2139705877 is 7785079312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 762256881 + 1377448996 = 27609^2 + 37114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139705877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139705877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139705817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154977 + ... + 168217.

It is an arithmetic number, because the mean of its divisors is an integer number (272619675).

Almost surely, 2^2139705877 is an apocalyptic number.

It is an amenable number.

2139705877 is a deficient number, since it is larger than the sum of its proper divisors (41251523).

2139705877 is a wasteful number, since it uses less digits than its factorization.

2139705877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16343.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 2139705877 is about 46256.9549041006. The cubic root of 2139705877 is about 1288.5997018036.

The spelling of 2139705877 in words is "two billion, one hundred thirty-nine million, seven hundred five thousand, eight hundred seventy-seven".