654643343 has 2 divisors, whose sum is σ = 654643344. Its totient is φ = 654643342.

The previous prime is 654643313. The next prime is 654643417. The reversal of 654643343 is 343346456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654643343 - 2⁶ = 654643279 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 654643297 and 654643306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654643313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327321671 + 327321672.

It is an arithmetic number, because the mean of its divisors is an integer number (327321672).

Almost surely, 2^654643343 is an apocalyptic number.

654643343 is a deficient number, since it is larger than the sum of its proper divisors (1).

654643343 is an equidigital number, since it uses as much as digits as its factorization.

654643343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 38.

The square root of 654643343 is about 25585.9989642773. The cubic root of 654643343 is about 868.2969029514.

Adding to 654643343 its reverse (343346456), we get a palindrome (997989799).

The spelling of 654643343 in words is "six hundred fifty-four million, six hundred forty-three thousand, three hundred forty-three".