671493 has 4 divisors (see below), whose sum is σ = 895328. Its totient is φ = 447660.

The previous prime is 671477. The next prime is 671501. The reversal of 671493 is 394176.

It is a happy number.

671493 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 not a de Polignac number, because 671493 - 2⁴ = 671477 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 671493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671443) 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, 111913 + ... + 111918.

It is an arithmetic number, because the mean of its divisors is an integer number (223832).

2⁶⁷¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

671493 is a deficient number, since it is larger than the sum of its proper divisors (223835).

671493 is a wasteful number, since it uses less digits than its factorization.

671493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223834.

The product of its digits is 4536, while the sum is 30.

The square root of 671493 is about 819.4467645918. The cubic root of 671493 is about 87.5683493171.

The spelling of 671493 in words is "six hundred seventy-one thousand, four hundred ninety-three".