1643000343 has 16 divisors (see below), whose sum is σ = 2322141696. Its totient is φ = 1029741440.

The previous prime is 1643000329. The next prime is 1643000353. The reversal of 1643000343 is 3430003461.

1643000343 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1643000343 - 2¹⁴ = 1642983959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643000323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28780 + ... + 64142.

It is an arithmetic number, because the mean of its divisors is an integer number (145133856).

Almost surely, 2^1643000343 is an apocalyptic number.

1643000343 is a deficient number, since it is larger than the sum of its proper divisors (679141353).

1643000343 is a wasteful number, since it uses less digits than its factorization.

1643000343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36294.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1643000343 is about 40533.9406300448. The cubic root of 1643000343 is about 1179.9924214298.

The spelling of 1643000343 in words is "one billion, six hundred forty-three million, three hundred forty-three", and thus it is an aban number.