428423843 has 2 divisors, whose sum is σ = 428423844. Its totient is φ = 428423842.

The previous prime is 428423833. The next prime is 428423917. The reversal of 428423843 is 348324824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428423843 - 2²⁶ = 361314979 is a prime.

It is a Sophie Germain prime.

It is equal to p_22768832 and since 428423843 and 22768832 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 428423797 and 428423806.

It is not a weakly prime, because it can be changed into another prime (428423803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214211921 + 214211922.

It is an arithmetic number, because the mean of its divisors is an integer number (214211922).

Almost surely, 2^428423843 is an apocalyptic number.

428423843 is a deficient number, since it is larger than the sum of its proper divisors (1).

428423843 is an equidigital number, since it uses as much as digits as its factorization.

428423843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 38.

The square root of 428423843 is about 20698.4019431453. The cubic root of 428423843 is about 753.8608864876.

The spelling of 428423843 in words is "four hundred twenty-eight million, four hundred twenty-three thousand, eight hundred forty-three".