284128863749 has 2 divisors, whose sum is σ = 284128863750. Its totient is φ = 284128863748.

The previous prime is 284128863679. The next prime is 284128863751. The reversal of 284128863749 is 947368821482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260824704100 + 23304159649 = 510710^2 + 152657^2 .

It is a cyclic number.

It is not a de Polignac number, because 284128863749 - 2³² = 279833896453 is a prime.

It is a super-2 number, since 2×284128863749² (a number of 24 digits) contains 22 as substring.

Together with 284128863751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 284128863691 and 284128863700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284128863769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142064431874 + 142064431875.

It is an arithmetic number, because the mean of its divisors is an integer number (142064431875).

Almost surely, 2^284128863749 is an apocalyptic number.

It is an amenable number.

284128863749 is a deficient number, since it is larger than the sum of its proper divisors (1).

284128863749 is an equidigital number, since it uses as much as digits as its factorization.

284128863749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 62.

The spelling of 284128863749 in words is "two hundred eighty-four billion, one hundred twenty-eight million, eight hundred sixty-three thousand, seven hundred forty-nine".