670979 has 4 divisors (see below), whose sum is σ = 700176. Its totient is φ = 641784.

The previous prime is 670963. The next prime is 670987. The reversal of 670979 is 979076.

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

It is a cyclic number.

It is not a de Polignac number, because 670979 - 2⁴ = 670963 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 14564 + ... + 14609.

It is an arithmetic number, because the mean of its divisors is an integer number (175044).

2⁶⁷⁰⁹⁷⁹ is an apocalyptic number.

670979 is a deficient number, since it is larger than the sum of its proper divisors (29197).

670979 is a wasteful number, since it uses less digits than its factorization.

670979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29196.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 670979 is about 819.1330783212. The cubic root of 670979 is about 87.5460003024.

The spelling of 670979 in words is "six hundred seventy thousand, nine hundred seventy-nine".