839138104257 has 8 divisors (see below), whose sum is σ = 1120126579776. Its totient is φ = 558787515792.

The previous prime is 839138104253. The next prime is 839138104261. The reversal of 839138104257 is 752401831938.

It is an interprime number because it is at equal distance from previous prime (839138104253) and next prime (839138104261).

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

It is not a de Polignac number, because 839138104257 - 2² = 839138104253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (839138104253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159468693 + ... + 159473954.

It is an arithmetic number, because the mean of its divisors is an integer number (140015822472).

Almost surely, 2^839138104257 is an apocalyptic number.

It is an amenable number.

839138104257 is a deficient number, since it is larger than the sum of its proper divisors (280988475519).

839138104257 is a wasteful number, since it uses less digits than its factorization.

839138104257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318943527.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 839138104257 in words is "eight hundred thirty-nine billion, one hundred thirty-eight million, one hundred four thousand, two hundred fifty-seven".