428237863 has 2 divisors, whose sum is σ = 428237864. Its totient is φ = 428237862.

The previous prime is 428237839. The next prime is 428237881. The reversal of 428237863 is 368732824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428237863 - 2²⁵ = 394683431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428237363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214118931 + 214118932.

It is an arithmetic number, because the mean of its divisors is an integer number (214118932).

Almost surely, 2^428237863 is an apocalyptic number.

428237863 is a deficient number, since it is larger than the sum of its proper divisors (1).

428237863 is an equidigital number, since it uses as much as digits as its factorization.

428237863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 43.

The square root of 428237863 is about 20693.9088381098. The cubic root of 428237863 is about 753.7517863194.

The spelling of 428237863 in words is "four hundred twenty-eight million, two hundred thirty-seven thousand, eight hundred sixty-three".