1284874847 has 2 divisors, whose sum is σ = 1284874848. Its totient is φ = 1284874846.

The previous prime is 1284874793. The next prime is 1284874849. The reversal of 1284874847 is 7484784821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1284874847 - 2³⁰ = 211133023 is a prime.

Together with 1284874849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284874849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642437423 + 642437424.

It is an arithmetic number, because the mean of its divisors is an integer number (642437424).

Almost surely, 2^1284874847 is an apocalyptic number.

1284874847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284874847 is an equidigital number, since it uses as much as digits as its factorization.

1284874847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3211264, while the sum is 53.

The square root of 1284874847 is about 35845.1509551850. The cubic root of 1284874847 is about 1087.1436724345.

The spelling of 1284874847 in words is "one billion, two hundred eighty-four million, eight hundred seventy-four thousand, eight hundred forty-seven".