840729341 has 2 divisors, whose sum is σ = 840729342. Its totient is φ = 840729340.

The previous prime is 840729319. The next prime is 840729349. The reversal of 840729341 is 143927048.

840729341 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659719225 + 181010116 = 25685^2 + 13454^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840729341 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 840729295 and 840729304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840729349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420364670 + 420364671.

It is an arithmetic number, because the mean of its divisors is an integer number (420364671).

Almost surely, 2^840729341 is an apocalyptic number.

It is an amenable number.

840729341 is a deficient number, since it is larger than the sum of its proper divisors (1).

840729341 is an equidigital number, since it uses as much as digits as its factorization.

840729341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 840729341 is about 28995.3330899992. Note that the first 3 decimals coincide. The cubic root of 840729341 is about 943.8117970382.

The spelling of 840729341 in words is "eight hundred forty million, seven hundred twenty-nine thousand, three hundred forty-one".