1283308749 has 6 divisors (see below), whose sum is σ = 1853668206. Its totient is φ = 855539160.

The previous prime is 1283308717. The next prime is 1283308751. The reversal of 1283308749 is 9478033821.

It can be written as a sum of positive squares in only one way, i.e., 697910724 + 585398025 = 26418^2 + 24195^2 .

It is not a de Polignac number, because 1283308749 - 2⁵ = 1283308717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283308709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71294922 + ... + 71294939.

It is an arithmetic number, because the mean of its divisors is an integer number (308944701).

Almost surely, 2^1283308749 is an apocalyptic number.

It is an amenable number.

1283308749 is a deficient number, since it is larger than the sum of its proper divisors (570359457).

1283308749 is a wasteful number, since it uses less digits than its factorization.

1283308749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142589867 (or 142589864 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1283308749 is about 35823.2989686880. The cubic root of 1283308749 is about 1086.7017965211.

The spelling of 1283308749 in words is "one billion, two hundred eighty-three million, three hundred eight thousand, seven hundred forty-nine".