671799 has 8 divisors (see below), whose sum is σ = 902272. Its totient is φ = 444600.

The previous prime is 671791. The next prime is 671831. The reversal of 671799 is 997176.

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

It is not a de Polignac number, because 671799 - 2³ = 671791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671791) 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, 289 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (112784).

2⁶⁷¹⁷⁹⁹ is an apocalyptic number.

671799 is a deficient number, since it is larger than the sum of its proper divisors (230473).

671799 is a wasteful number, since it uses less digits than its factorization.

671799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 23814, while the sum is 39.

The square root of 671799 is about 819.6334546613. The cubic root of 671799 is about 87.5816489572.

The spelling of 671799 in words is "six hundred seventy-one thousand, seven hundred ninety-nine".