670997 has 4 divisors (see below), whose sum is σ = 677376. Its totient is φ = 664620.

The previous prime is 670991. The next prime is 671003. The reversal of 670997 is 799076.

670997 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (670991) and next prime (671003).

It is a cyclic number.

It is not a de Polignac number, because 670997 - 2¹² = 666901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670991) 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, 3029 + ... + 3242.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2⁶⁷⁰⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

670997 is a deficient number, since it is larger than the sum of its proper divisors (6379).

670997 is a wasteful number, since it uses less digits than its factorization.

670997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378.

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

The square root of 670997 is about 819.1440654732. The cubic root of 670997 is about 87.5467831455.

The spelling of 670997 in words is "six hundred seventy thousand, nine hundred ninety-seven".