670899 has 4 divisors (see below), whose sum is σ = 894536. Its totient is φ = 447264.

The previous prime is 670897. The next prime is 670903. The reversal of 670899 is 998076.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 670899 - 2¹ = 670897 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111814 + ... + 111819.

It is an arithmetic number, because the mean of its divisors is an integer number (223634).

2⁶⁷⁰⁸⁹⁹ is an apocalyptic number.

670899 is a deficient number, since it is larger than the sum of its proper divisors (223637).

670899 is a wasteful number, since it uses less digits than its factorization.

670899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223636.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 670899 is about 819.0842447514. The cubic root of 670899 is about 87.5425208302.

The spelling of 670899 in words is "six hundred seventy thousand, eight hundred ninety-nine".