654943 has 2 divisors, whose sum is σ = 654944. Its totient is φ = 654942.

The previous prime is 654931. The next prime is 654967. The reversal of 654943 is 349456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654943 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327471 + 327472.

It is an arithmetic number, because the mean of its divisors is an integer number (327472).

2⁶⁵⁴⁹⁴³ is an apocalyptic number.

654943 is a deficient number, since it is larger than the sum of its proper divisors (1).

654943 is an equidigital number, since it uses as much as digits as its factorization.

654943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 654943 is about 809.2854873282. The cubic root of 654943 is about 86.8429367729.

The spelling of 654943 in words is "six hundred fifty-four thousand, nine hundred forty-three".