842138379 has 12 divisors (see below), whose sum is σ = 1219636600. Its totient is φ = 559941984.

The previous prime is 842138369. The next prime is 842138431. The reversal of 842138379 is 973831248.

It is not a de Polignac number, because 842138379 - 2¹⁵ = 842105611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842138309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120034 + ... + 126855.

Almost surely, 2^842138379 is an apocalyptic number.

842138379 is a deficient number, since it is larger than the sum of its proper divisors (377498221).

842138379 is a wasteful number, since it uses less digits than its factorization.

842138379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247274 (or 247271 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 842138379 is about 29019.6205867685. The cubic root of 842138379 is about 944.3387698199.

The spelling of 842138379 in words is "eight hundred forty-two million, one hundred thirty-eight thousand, three hundred seventy-nine".