842941781 has 6 divisors (see below), whose sum is σ = 926539446. Its totient is φ = 766310600.

The previous prime is 842941751. The next prime is 842941831. The reversal of 842941781 is 187149248.

842941781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 559322500 + 283619281 = 23650^2 + 16841^2 .

It is not a de Polignac number, because 842941781 - 2⁶ = 842941717 is a prime.

It is a super-2 number, since 2×842941781² = 1421101692310903922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842941721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3483110 + ... + 3483351.

It is an arithmetic number, because the mean of its divisors is an integer number (154423241).

Almost surely, 2^842941781 is an apocalyptic number.

It is an amenable number.

842941781 is a deficient number, since it is larger than the sum of its proper divisors (83597665).

842941781 is a wasteful number, since it uses less digits than its factorization.

842941781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966483 (or 6966472 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 842941781 is about 29033.4596801690. The cubic root of 842941781 is about 944.6389748460.

The spelling of 842941781 in words is "eight hundred forty-two million, nine hundred forty-one thousand, seven hundred eighty-one".