840634283 has 2 divisors, whose sum is σ = 840634284. Its totient is φ = 840634282.

The previous prime is 840634259. The next prime is 840634297. The reversal of 840634283 is 382436048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840634283 is a prime.

It is not a weakly prime, because it can be changed into another prime (840634213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420317141 + 420317142.

It is an arithmetic number, because the mean of its divisors is an integer number (420317142).

Almost surely, 2^840634283 is an apocalyptic number.

840634283 is a deficient number, since it is larger than the sum of its proper divisors (1).

840634283 is an equidigital number, since it uses as much as digits as its factorization.

840634283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 840634283 is about 28993.6938488355. The cubic root of 840634283 is about 943.7762246532.

The spelling of 840634283 in words is "eight hundred forty million, six hundred thirty-four thousand, two hundred eighty-three".