670949 has 4 divisors (see below), whose sum is σ = 677964. Its totient is φ = 663936.

The previous prime is 670931. The next prime is 670951. The reversal of 670949 is 949076.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 368449 + 302500 = 607^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 670949 - 2⁸ = 670693 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

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 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, 3362 + ... + 3555.

It is an arithmetic number, because the mean of its divisors is an integer number (169491).

2⁶⁷⁰⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

670949 is a deficient number, since it is larger than the sum of its proper divisors (7015).

670949 is an equidigital number, since it uses as much as digits as its factorization.

670949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 670949 is about 819.1147660737. The cubic root of 670949 is about 87.5446955327.

The spelling of 670949 in words is "six hundred seventy thousand, nine hundred forty-nine".