670591 has 4 divisors (see below), whose sum is σ = 675184. Its totient is φ = 666000.

The previous prime is 670583. The next prime is 670597. The reversal of 670591 is 195076.

It is a happy number.

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 670591 - 2³ = 670583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670597) 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, 2070 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (168796).

2⁶⁷⁰⁵⁹¹ is an apocalyptic number.

670591 is a deficient number, since it is larger than the sum of its proper divisors (4593).

670591 is a wasteful number, since it uses less digits than its factorization.

670591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 670591 is about 818.8962083195. The cubic root of 670591 is about 87.5291222791.

The spelling of 670591 in words is "six hundred seventy thousand, five hundred ninety-one".