1283138743 has 8 divisors (see below), whose sum is σ = 1339344000. Its totient is φ = 1226968248.

The previous prime is 1283138729. The next prime is 1283138783. The reversal of 1283138743 is 3478313821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283138743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1283138696 and 1283138705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283138713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91408 + ... + 104506.

It is an arithmetic number, because the mean of its divisors is an integer number (167418000).

Almost surely, 2^1283138743 is an apocalyptic number.

1283138743 is a deficient number, since it is larger than the sum of its proper divisors (56205257).

1283138743 is a wasteful number, since it uses less digits than its factorization.

1283138743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17381.

The product of its digits is 96768, while the sum is 40.

The square root of 1283138743 is about 35820.9260488894. The cubic root of 1283138743 is about 1086.6538075540.

The spelling of 1283138743 in words is "one billion, two hundred eighty-three million, one hundred thirty-eight thousand, seven hundred forty-three".