428656843 has 2 divisors, whose sum is σ = 428656844. Its totient is φ = 428656842.

The previous prime is 428656817. The next prime is 428656847. The reversal of 428656843 is 348656824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428656843 - 2⁹ = 428656331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428656793 and 428656802.

It is not a weakly prime, because it can be changed into another prime (428656847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214328421 + 214328422.

It is an arithmetic number, because the mean of its divisors is an integer number (214328422).

Almost surely, 2^428656843 is an apocalyptic number.

428656843 is a deficient number, since it is larger than the sum of its proper divisors (1).

428656843 is an equidigital number, since it uses as much as digits as its factorization.

428656843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 46.

The square root of 428656843 is about 20704.0296319340. The cubic root of 428656843 is about 753.9975251275.

The spelling of 428656843 in words is "four hundred twenty-eight million, six hundred fifty-six thousand, eight hundred forty-three".