2138477139 has 48 divisors (see below), whose sum is σ = 3362617440. Its totient is φ = 1342333440.

The previous prime is 2138477093. The next prime is 2138477153. The reversal of 2138477139 is 9317748312.

It is a de Polignac number, because none of the positive numbers 2^k-2138477139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2138477094 and 2138477103.

It is not an unprimeable number, because it can be changed into a prime (2138477239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 929839 + ... + 932135.

It is an arithmetic number, because the mean of its divisors is an integer number (70054530).

Almost surely, 2^2138477139 is an apocalyptic number.

2138477139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2138477139 is a deficient number, since it is larger than the sum of its proper divisors (1224140301).

2138477139 is a wasteful number, since it uses less digits than its factorization.

2138477139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2370 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 2138477139 is about 46243.6713399791. The cubic root of 2138477139 is about 1288.3529927244.

The spelling of 2138477139 in words is "two billion, one hundred thirty-eight million, four hundred seventy-seven thousand, one hundred thirty-nine".