843138925 has 12 divisors (see below), whose sum is σ = 1053477216. Its totient is φ = 669359600.

The previous prime is 843138917. The next prime is 843138929. The reversal of 843138925 is 529831348.

It is not a de Polignac number, because 843138925 - 2³ = 843138917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843138929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125449 + ... + 131998.

It is an arithmetic number, because the mean of its divisors is an integer number (87789768).

Almost surely, 2^843138925 is an apocalyptic number.

It is an amenable number.

843138925 is a deficient number, since it is larger than the sum of its proper divisors (210338291).

843138925 is a wasteful number, since it uses less digits than its factorization.

843138925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257588 (or 257583 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 843138925 is about 29036.8545989403. The cubic root of 843138925 is about 944.7126119559.

The spelling of 843138925 in words is "eight hundred forty-three million, one hundred thirty-eight thousand, nine hundred twenty-five".