2139468277 has 2 divisors, whose sum is σ = 2139468278. Its totient is φ = 2139468276.

The previous prime is 2139468259. The next prime is 2139468281. The reversal of 2139468277 is 7728649312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2095259076 + 44209201 = 45774^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139468277 - 2²³ = 2131079669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2139468277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139468217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069734138 + 1069734139.

It is an arithmetic number, because the mean of its divisors is an integer number (1069734139).

Almost surely, 2^2139468277 is an apocalyptic number.

It is an amenable number.

2139468277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139468277 is an equidigital number, since it uses as much as digits as its factorization.

2139468277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 2139468277 is about 46254.3865703568. The cubic root of 2139468277 is about 1288.5520032506.

The spelling of 2139468277 in words is "two billion, one hundred thirty-nine million, four hundred sixty-eight thousand, two hundred seventy-seven".