603640643 has 2 divisors, whose sum is σ = 603640644. Its totient is φ = 603640642.

The previous prime is 603640637. The next prime is 603640669. The reversal of 603640643 is 346046306.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 603640643 - 2²⁴ = 586863427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (603640613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301820321 + 301820322.

It is an arithmetic number, because the mean of its divisors is an integer number (301820322).

Almost surely, 2^603640643 is an apocalyptic number.

603640643 is a deficient number, since it is larger than the sum of its proper divisors (1).

603640643 is an equidigital number, since it uses as much as digits as its factorization.

603640643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 603640643 is about 24569.0993526421. The cubic root of 603640643 is about 845.1351361199.

Adding to 603640643 its reverse (346046306), we get a palindrome (949686949).

The spelling of 603640643 in words is "six hundred three million, six hundred forty thousand, six hundred forty-three".