1283787047 has 4 divisors (see below), whose sum is σ = 1283859720. Its totient is φ = 1283714376.

The previous prime is 1283787023. The next prime is 1283787061. The reversal of 1283787047 is 7407873821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7407873821 = 71 ⋅104336251.

It is a cyclic number.

It is not a de Polignac number, because 1283787047 - 2²⁴ = 1267009831 is a prime.

It is a super-3 number, since 3×1283787047³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1283786992 and 1283787010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283787007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9104 + ... + 51482.

It is an arithmetic number, because the mean of its divisors is an integer number (320964930).

Almost surely, 2^1283787047 is an apocalyptic number.

1283787047 is a deficient number, since it is larger than the sum of its proper divisors (72673).

1283787047 is an equidigital number, since it uses as much as digits as its factorization.

1283787047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72672.

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 1283787047 is about 35829.9741417713. The cubic root of 1283787047 is about 1086.8367868306.

The spelling of 1283787047 in words is "one billion, two hundred eighty-three million, seven hundred eighty-seven thousand, forty-seven".