671023 has 4 divisors (see below), whose sum is σ = 706360. Its totient is φ = 635688.

The previous prime is 671017. The next prime is 671029. The reversal of 671023 is 320176.

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

It is an interprime number because it is at equal distance from previous prime (671017) and next prime (671029).

It is a cyclic number.

It is not a de Polignac number, because 671023 - 2⁵ = 670991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 35317 = 671023 / (6 + 7 + 1 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671029) 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, 17640 + ... + 17677.

It is an arithmetic number, because the mean of its divisors is an integer number (176590).

2⁶⁷¹⁰²³ is an apocalyptic number.

671023 is a deficient number, since it is larger than the sum of its proper divisors (35337).

671023 is a wasteful number, since it uses less digits than its factorization.

671023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35336.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 671023 is about 819.1599355437. The cubic root of 671023 is about 87.5479138942.

Adding to 671023 its reverse (320176), we get a palindrome (991199).

The spelling of 671023 in words is "six hundred seventy-one thousand, twenty-three".