428783865869 has 2 divisors, whose sum is σ = 428783865870. Its totient is φ = 428783865868.

The previous prime is 428783865841. The next prime is 428783865949. The reversal of 428783865869 is 968568387824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392581192969 + 36202672900 = 626563^2 + 190270^2 .

It is a cyclic number.

It is not a de Polignac number, because 428783865869 - 2⁸ = 428783865613 is a prime.

It is a super-2 number, since 2×428783865869² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428783865796 and 428783865805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428786865869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214391932934 + 214391932935.

It is an arithmetic number, because the mean of its divisors is an integer number (214391932935).

Almost surely, 2^428783865869 is an apocalyptic number.

It is an amenable number.

428783865869 is a deficient number, since it is larger than the sum of its proper divisors (1).

428783865869 is an equidigital number, since it uses as much as digits as its factorization.

428783865869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1114767360, while the sum is 74.

The spelling of 428783865869 in words is "four hundred twenty-eight billion, seven hundred eighty-three million, eight hundred sixty-five thousand, eight hundred sixty-nine".