1283378943 has 48 divisors (see below), whose sum is σ = 2299290624. Its totient is φ = 627459840.

The previous prime is 1283378927. The next prime is 1283378947. The reversal of 1283378943 is 3498733821.

It is not a de Polignac number, because 1283378943 - 2⁴ = 1283378927 is a prime.

It is a super-2 number, since 2×1283378943² = 3294123022671594498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1283378892 and 1283378901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283378947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4146 + ... + 50832.

It is an arithmetic number, because the mean of its divisors is an integer number (47901888).

Almost surely, 2^1283378943 is an apocalyptic number.

1283378943 is a deficient number, since it is larger than the sum of its proper divisors (1015911681).

1283378943 is a wasteful number, since it uses less digits than its factorization.

1283378943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46732 (or 46725 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 1283378943 is about 35824.2786808053. The cubic root of 1283378943 is about 1086.7216095124.

The spelling of 1283378943 in words is "one billion, two hundred eighty-three million, three hundred seventy-eight thousand, nine hundred forty-three".