840459341 has 2 divisors, whose sum is σ = 840459342. Its totient is φ = 840459340.

The previous prime is 840459289. The next prime is 840459371. The reversal of 840459341 is 143954048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751911241 + 88548100 = 27421^2 + 9410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840459341 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 840459295 and 840459304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840459371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420229670 + 420229671.

It is an arithmetic number, because the mean of its divisors is an integer number (420229671).

Almost surely, 2^840459341 is an apocalyptic number.

It is an amenable number.

840459341 is a deficient number, since it is larger than the sum of its proper divisors (1).

840459341 is an equidigital number, since it uses as much as digits as its factorization.

840459341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 840459341 is about 28990.6767944455. The cubic root of 840459341 is about 943.7107512529.

The spelling of 840459341 in words is "eight hundred forty million, four hundred fifty-nine thousand, three hundred forty-one".