670547 has 4 divisors (see below), whose sum is σ = 674976. Its totient is φ = 666120.

The previous prime is 670543. The next prime is 670559. The reversal of 670547 is 745076.

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 670547 - 2² = 670543 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670541) 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, 1979 + ... + 2292.

It is an arithmetic number, because the mean of its divisors is an integer number (168744).

2⁶⁷⁰⁵⁴⁷ is an apocalyptic number.

670547 is a deficient number, since it is larger than the sum of its proper divisors (4429).

670547 is a wasteful number, since it uses less digits than its factorization.

670547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 670547 is about 818.8693424473. The cubic root of 670547 is about 87.5272078654.

Subtracting 670547 from its reverse (745076), we obtain a square (74529 = 273²).

The spelling of 670547 in words is "six hundred seventy thousand, five hundred forty-seven".