654671 has 2 divisors, whose sum is σ = 654672. Its totient is φ = 654670.

The previous prime is 654629. The next prime is 654679. The reversal of 654671 is 176456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654671 - 2¹⁰ = 653647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327335 + 327336.

It is an arithmetic number, because the mean of its divisors is an integer number (327336).

2⁶⁵⁴⁶⁷¹ is an apocalyptic number.

654671 is a deficient number, since it is larger than the sum of its proper divisors (1).

654671 is an equidigital number, since it uses as much as digits as its factorization.

654671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 654671 is about 809.1174204032. The cubic root of 654671 is about 86.8309130551.

It can be divided in two parts, 654 and 671, that multiplied together give a palindrome (438834).

The spelling of 654671 in words is "six hundred fifty-four thousand, six hundred seventy-one".