671899 has 8 divisors (see below), whose sum is σ = 709632. Its totient is φ = 634920.

The previous prime is 671893. The next prime is 671903. The reversal of 671899 is 998176.

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-671899 is a prime.

It is an Ulam number.

It is a Duffinian 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, 2902 + ... + 3124.

It is an arithmetic number, because the mean of its divisors is an integer number (88704).

2⁶⁷¹⁸⁹⁹ is an apocalyptic number.

671899 is a deficient number, since it is larger than the sum of its proper divisors (37733).

671899 is a wasteful number, since it uses less digits than its factorization.

671899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377.

The product of its digits is 27216, while the sum is 40.

The square root of 671899 is about 819.6944552698. The cubic root of 671899 is about 87.5859943692.

The spelling of 671899 in words is "six hundred seventy-one thousand, eight hundred ninety-nine".