1283555447 has 2 divisors, whose sum is σ = 1283555448. Its totient is φ = 1283555446.

The previous prime is 1283555407. The next prime is 1283555459. The reversal of 1283555447 is 7445553821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1283555447 - 2⁸ = 1283555191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1283555398 and 1283555407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283555407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641777723 + 641777724.

It is an arithmetic number, because the mean of its divisors is an integer number (641777724).

Almost surely, 2^1283555447 is an apocalyptic number.

1283555447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283555447 is an equidigital number, since it uses as much as digits as its factorization.

1283555447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672000, while the sum is 44.

The square root of 1283555447 is about 35826.7420651111. The cubic root of 1283555447 is about 1086.7714264220.

The spelling of 1283555447 in words is "one billion, two hundred eighty-three million, five hundred fifty-five thousand, four hundred forty-seven".