671803 has 8 divisors (see below), whose sum is σ = 739440. Its totient is φ = 605280.

The previous prime is 671791. The next prime is 671831. The reversal of 671803 is 308176.

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-671803 is a prime.

It is a Duffinian number.

671803 is a lucky number.

It is a plaindrome in base 9.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1533 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (92430).

2⁶⁷¹⁸⁰³ is an apocalyptic number.

671803 is a deficient number, since it is larger than the sum of its proper divisors (67637).

671803 is a wasteful number, since it uses less digits than its factorization.

671803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 671803 is about 819.6358947728. The cubic root of 671803 is about 87.5818227820.

Adding to 671803 its reverse (308176), we get a palindrome (979979).

The spelling of 671803 in words is "six hundred seventy-one thousand, eight hundred three".