167843421 has 20 divisors (see below), whose sum is σ = 255466332. Its totient is φ = 109781568.

The previous prime is 167843407. The next prime is 167843437. The reversal of 167843421 is 124348761.

It can be written as a sum of positive squares in 2 ways, for example, as 95355225 + 72488196 = 9765^2 + 8514^2 .

It is not a de Polignac number, because 167843421 - 2⁷ = 167843293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167843461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15256 + ... + 23841.

Almost surely, 2^167843421 is an apocalyptic number.

It is an amenable number.

167843421 is a deficient number, since it is larger than the sum of its proper divisors (87622911).

167843421 is an equidigital number, since it uses as much as digits as its factorization.

167843421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39162 (or 39153 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 167843421 is about 12955.4398227154. The cubic root of 167843421 is about 551.6133575518.

The spelling of 167843421 in words is "one hundred sixty-seven million, eight hundred forty-three thousand, four hundred twenty-one".