4089643 has 2 divisors, whose sum is σ = 4089644. Its totient is φ = 4089642.

The previous prime is 4089619. The next prime is 4089677. The reversal of 4089643 is 3469804.

It is an a-pointer prime, because the next prime (4089677) can be obtained adding 4089643 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4089643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4089599 and 4089608.

It is not a weakly prime, because it can be changed into another prime (4089143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2044821 + 2044822.

It is an arithmetic number, because the mean of its divisors is an integer number (2044822).

Almost surely, 2^4089643 is an apocalyptic number.

4089643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4089643 is an equidigital number, since it uses as much as digits as its factorization.

4089643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 4089643 is about 2022.2865771201. The cubic root of 4089643 is about 159.9171837040.

The spelling of 4089643 in words is "four million, eighty-nine thousand, six hundred forty-three".