641803 has 2 divisors, whose sum is σ = 641804. Its totient is φ = 641802.

The previous prime is 641791. The next prime is 641813. The reversal of 641803 is 308146.

641803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641803 is a prime.

It is a super-2 number, since 2×641803² = 823822181618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320901 + 320902.

It is an arithmetic number, because the mean of its divisors is an integer number (320902).

2⁶⁴¹⁸⁰³ is an apocalyptic number.

641803 is a deficient number, since it is larger than the sum of its proper divisors (1).

641803 is an equidigital number, since it uses as much as digits as its factorization.

641803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 641803 is about 801.1260824614. The cubic root of 641803 is about 86.2582376785.

Adding to 641803 its reverse (308146), we get a palindrome (949949).

It can be divided in two parts, 641 and 803, that added together give a square (1444 = 38²).

The spelling of 641803 in words is "six hundred forty-one thousand, eight hundred three".