2139494047 has 8 divisors (see below), whose sum is σ = 2338422912. Its totient is φ = 1948684800.

The previous prime is 2139494041. The next prime is 2139494143. The reversal of 2139494047 is 7404949312.

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

It is not a de Polignac number, because 2139494047 - 2¹¹ = 2139491999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2139493994 and 2139494012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139494041) 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 7 ways as a sum of consecutive naturals, for example, 2029354 + ... + 2030407.

It is an arithmetic number, because the mean of its divisors is an integer number (292302864).

Almost surely, 2^2139494047 is an apocalyptic number.

2139494047 is a deficient number, since it is larger than the sum of its proper divisors (198928865).

2139494047 is a wasteful number, since it uses less digits than its factorization.

2139494047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059809.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 2139494047 is about 46254.6651376918. The cubic root of 2139494047 is about 1288.5571767871.

The spelling of 2139494047 in words is "two billion, one hundred thirty-nine million, four hundred ninety-four thousand, forty-seven".