428543923 has 2 divisors, whose sum is σ = 428543924. Its totient is φ = 428543922.

The previous prime is 428543893. The next prime is 428544019. The reversal of 428543923 is 329345824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428543923 - 2¹⁷ = 428412851 is a prime.

It is not a weakly prime, because it can be changed into another prime (428543623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214271961 + 214271962.

It is an arithmetic number, because the mean of its divisors is an integer number (214271962).

Almost surely, 2^428543923 is an apocalyptic number.

428543923 is a deficient number, since it is larger than the sum of its proper divisors (1).

428543923 is an equidigital number, since it uses as much as digits as its factorization.

428543923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 428543923 is about 20701.3024469476. The cubic root of 428543923 is about 753.9313114189.

The spelling of 428543923 in words is "four hundred twenty-eight million, five hundred forty-three thousand, nine hundred twenty-three".