843308138 has 4 divisors (see below), whose sum is σ = 1264962210. Its totient is φ = 421654068.

The previous prime is 843308113. The next prime is 843308143. The reversal of 843308138 is 831803348.

It is a happy number.

843308138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 814931209 + 28376929 = 28547^2 + 5327^2 .

It is a super-2 number, since 2×843308138² = 1422337231234054088, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210827033 + ... + 210827036.

Almost surely, 2^843308138 is an apocalyptic number.

843308138 is a deficient number, since it is larger than the sum of its proper divisors (421654072).

843308138 is a wasteful number, since it uses less digits than its factorization.

843308138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421654071.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 843308138 is about 29039.7682153284. The cubic root of 843308138 is about 944.7758071414.

The spelling of 843308138 in words is "eight hundred forty-three million, three hundred eight thousand, one hundred thirty-eight".