843967138 has 16 divisors (see below), whose sum is σ = 1453294080. Its totient is φ = 360076896.

The previous prime is 843967133. The next prime is 843967171. The reversal of 843967138 is 831769348.

It is a happy number.

843967138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×843967138² = 1424561060047822088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 843967091 and 843967100.

It is not an unprimeable number, because it can be changed into a prime (843967133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132043 + ... + 138286.

It is an arithmetic number, because the mean of its divisors is an integer number (90830880).

Almost surely, 2^843967138 is an apocalyptic number.

843967138 is a deficient number, since it is larger than the sum of its proper divisors (609326942).

843967138 is a wasteful number, since it uses less digits than its factorization.

843967138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270561.

The product of its digits is 870912, while the sum is 49.

The square root of 843967138 is about 29051.1125088180. The cubic root of 843967138 is about 945.0218402425.

The spelling of 843967138 in words is "eight hundred forty-three million, nine hundred sixty-seven thousand, one hundred thirty-eight".