671123 has 2 divisors, whose sum is σ = 671124. Its totient is φ = 671122.

The previous prime is 671093. The next prime is 671131. The reversal of 671123 is 321176.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671123 - 2⁶ = 671059 is a prime.

It is a super-2 number, since 2×671123² = 900812162258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 671095 and 671104.

It is not a weakly prime, because it can be changed into another prime (671323) 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 as a sum of consecutive naturals, namely, 335561 + 335562.

It is an arithmetic number, because the mean of its divisors is an integer number (335562).

2⁶⁷¹¹²³ is an apocalyptic number.

671123 is a deficient number, since it is larger than the sum of its proper divisors (1).

671123 is an equidigital number, since it uses as much as digits as its factorization.

671123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 20.

The square root of 671123 is about 819.2209714113. The cubic root of 671123 is about 87.5522626555.

Adding to 671123 its reverse (321176), we get a palindrome (992299).

The spelling of 671123 in words is "six hundred seventy-one thousand, one hundred twenty-three".