3201643 has 2 divisors, whose sum is σ = 3201644. Its totient is φ = 3201642.

The previous prime is 3201641. The next prime is 3201689. The reversal of 3201643 is 3461023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3201643 - 2¹ = 3201641 is a prime.

Together with 3201641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3201643.

It is not a weakly prime, because it can be changed into another prime (3201641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600821 + 1600822.

It is an arithmetic number, because the mean of its divisors is an integer number (1600822).

Almost surely, 2^3201643 is an apocalyptic number.

3201643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3201643 is an equidigital number, since it uses as much as digits as its factorization.

3201643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3201643 is about 1789.3135555290. The cubic root of 3201643 is about 147.3864758961.

Adding to 3201643 its reverse (3461023), we get a palindrome (6662666).

It can be divided in two parts, 3201 and 643, that added together give a square (3844 = 62²).

The spelling of 3201643 in words is "three million, two hundred one thousand, six hundred forty-three".