73843421 has 4 divisors (see below), whose sum is σ = 73913952. Its totient is φ = 73772892.

The previous prime is 73843403. The next prime is 73843487. The reversal of 73843421 is 12434837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73843421 - 2¹⁴ = 73827037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73843321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33671 + ... + 35796.

It is an arithmetic number, because the mean of its divisors is an integer number (18478488).

Almost surely, 2^73843421 is an apocalyptic number.

It is an amenable number.

73843421 is a deficient number, since it is larger than the sum of its proper divisors (70531).

73843421 is a wasteful number, since it uses less digits than its factorization.

73843421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70530.

The product of its digits is 16128, while the sum is 32.

The square root of 73843421 is about 8593.2194781700. The cubic root of 73843421 is about 419.5373230743.

The spelling of 73843421 in words is "seventy-three million, eight hundred forty-three thousand, four hundred twenty-one".