2139619977 has 24 divisors (see below), whose sum is σ = 3382411968. Its totient is φ = 1292551200.

The previous prime is 2139619967. The next prime is 2139619981. The reversal of 2139619977 is 7799169312.

It is a happy number.

2139619977 is a `hidden beast` number, since 2 + 13 + 9 + 619 + 9 + 7 + 7 = 666.

It is not a de Polignac number, because 2139619977 - 2¹¹ = 2139617929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2139619967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3958 + ... + 65535.

It is an arithmetic number, because the mean of its divisors is an integer number (140933832).

Almost surely, 2^2139619977 is an apocalyptic number.

It is an amenable number.

2139619977 is a deficient number, since it is larger than the sum of its proper divisors (1242791991).

2139619977 is a wasteful number, since it uses less digits than its factorization.

2139619977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69821 (or 69818 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 2139619977 is about 46256.0263857586. The cubic root of 2139619977 is about 1288.5824576585.

The spelling of 2139619977 in words is "two billion, one hundred thirty-nine million, six hundred nineteen thousand, nine hundred seventy-seven".