840743139 has 8 divisors (see below), whose sum is σ = 1124643520. Its totient is φ = 558669096.

The previous prime is 840743129. The next prime is 840743149. The reversal of 840743139 is 931347048.

840743139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (840743129) and next prime (840743149).

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

It is not a de Polignac number, because 840743139 - 2⁷ = 840743011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840743097 and 840743106.

It is not an unprimeable number, because it can be changed into a prime (840743129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455509 + ... + 457350.

It is an arithmetic number, because the mean of its divisors is an integer number (140580440).

Almost surely, 2^840743139 is an apocalyptic number.

840743139 is a deficient number, since it is larger than the sum of its proper divisors (283900381).

840743139 is a wasteful number, since it uses less digits than its factorization.

840743139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913169.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 840743139 is about 28995.5710238650. The cubic root of 840743139 is about 943.8169602710.

The spelling of 840743139 in words is "eight hundred forty million, seven hundred forty-three thousand, one hundred thirty-nine".