1284474839 has 2 divisors, whose sum is σ = 1284474840. Its totient is φ = 1284474838.

The previous prime is 1284474817. The next prime is 1284474847. The reversal of 1284474839 is 9384744821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1284474839 - 2¹⁶ = 1284409303 is a prime.

It is a super-3 number, since 3×1284474839³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284474539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642237419 + 642237420.

It is an arithmetic number, because the mean of its divisors is an integer number (642237420).

Almost surely, 2^1284474839 is an apocalyptic number.

1284474839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284474839 is an equidigital number, since it uses as much as digits as its factorization.

1284474839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The square root of 1284474839 is about 35839.5708540155. The cubic root of 1284474839 is about 1087.0308439873.

The spelling of 1284474839 in words is "one billion, two hundred eighty-four million, four hundred seventy-four thousand, eight hundred thirty-nine".