623671 has 2 divisors, whose sum is σ = 623672. Its totient is φ = 623670.

The previous prime is 623669. The next prime is 623677. The reversal of 623671 is 176326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623671 - 2¹ = 623669 is a prime.

Together with 623669, it forms a pair of twin primes.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623671.

It is not a weakly prime, because it can be changed into another prime (623677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311835 + 311836.

It is an arithmetic number, because the mean of its divisors is an integer number (311836).

2⁶²³⁶⁷¹ is an apocalyptic number.

623671 is a deficient number, since it is larger than the sum of its proper divisors (1).

623671 is an equidigital number, since it uses as much as digits as its factorization.

623671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 623671 is about 789.7284343368. The cubic root of 623671 is about 85.4381527811.

Adding to 623671 its reverse (176326), we get a palindrome (799997).

The spelling of 623671 in words is "six hundred twenty-three thousand, six hundred seventy-one".