840622943 has 8 divisors (see below), whose sum is σ = 863818128. Its totient is φ = 817452864.

The previous prime is 840622891. The next prime is 840622949. The reversal of 840622943 is 349226048.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 840622943 - 2⁶ = 840622879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840622897 and 840622906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840622949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76355 + ... + 86667.

It is an arithmetic number, because the mean of its divisors is an integer number (107977266).

Almost surely, 2^840622943 is an apocalyptic number.

840622943 is a deficient number, since it is larger than the sum of its proper divisors (23195185).

840622943 is a wasteful number, since it uses less digits than its factorization.

840622943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12553.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 840622943 is about 28993.4982884094. The cubic root of 840622943 is about 943.7719808456.

The spelling of 840622943 in words is "eight hundred forty million, six hundred twenty-two thousand, nine hundred forty-three".