641903 has 8 divisors (see below), whose sum is σ = 691920. Its totient is φ = 593280.

The previous prime is 641897. The next prime is 641909. The reversal of 641903 is 309146.

It is an interprime number because it is at equal distance from previous prime (641897) and next prime (641909).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641903 is a prime.

It is a super-2 number, since 2×641903² = 824078922818, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (86490).

2⁶⁴¹⁹⁰³ is an apocalyptic number.

641903 is a deficient number, since it is larger than the sum of its proper divisors (50017).

641903 is a wasteful number, since it uses less digits than its factorization.

641903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 641903 is about 801.1884921790. The cubic root of 641903 is about 86.2627174414.

The spelling of 641903 in words is "six hundred forty-one thousand, nine hundred three".