1600843421 has 2 divisors, whose sum is σ = 1600843422. Its totient is φ = 1600843420.

The previous prime is 1600843417. The next prime is 1600843487. The reversal of 1600843421 is 1243480061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1257482521 + 343360900 = 35461^2 + 18530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600843421 - 2² = 1600843417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1600843721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800421710 + 800421711.

It is an arithmetic number, because the mean of its divisors is an integer number (800421711).

Almost surely, 2^1600843421 is an apocalyptic number.

It is an amenable number.

1600843421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600843421 is an equidigital number, since it uses as much as digits as its factorization.

1600843421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1600843421 is about 40010.5413734931. The cubic root of 1600843421 is about 1169.8125740145.

The spelling of 1600843421 in words is "one billion, six hundred million, eight hundred forty-three thousand, four hundred twenty-one".