839392942 has 4 divisors (see below), whose sum is σ = 1259089416. Its totient is φ = 419696470.

The previous prime is 839392937. The next prime is 839392943. The reversal of 839392942 is 249293938.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×839392942² = 1409161022158830728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839392943) 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 as a sum of consecutive naturals, namely, 209848234 + ... + 209848237.

It is an arithmetic number, because the mean of its divisors is an integer number (314772354).

Almost surely, 2^839392942 is an apocalyptic number.

839392942 is a deficient number, since it is larger than the sum of its proper divisors (419696474).

839392942 is a wasteful number, since it uses less digits than its factorization.

839392942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419696473.

The product of its digits is 839808, while the sum is 49.

The square root of 839392942 is about 28972.2788541047. The cubic root of 839392942 is about 943.3114465351.

The spelling of 839392942 in words is "eight hundred thirty-nine million, three hundred ninety-two thousand, nine hundred forty-two".