670918 has 4 divisors (see below), whose sum is σ = 1006380. Its totient is φ = 335458.

The previous prime is 670903. The next prime is 670919. The reversal of 670918 is 819076.

670918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 670918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167728 + ... + 167731.

It is an arithmetic number, because the mean of its divisors is an integer number (251595).

2⁶⁷⁰⁹¹⁸ is an apocalyptic number.

670918 is a deficient number, since it is larger than the sum of its proper divisors (335462).

670918 is a wasteful number, since it uses less digits than its factorization.

670918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335461.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 670918 is about 819.0958429879. The cubic root of 670918 is about 87.5433472299.

The spelling of 670918 in words is "six hundred seventy thousand, nine hundred eighteen".