1283893381 has 4 divisors (see below), whose sum is σ = 1284613632. Its totient is φ = 1283173132.

The previous prime is 1283893367. The next prime is 1283893399. The reversal of 1283893381 is 1833983821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1283893381 - 2¹¹ = 1283891333 is a prime.

It is a super-2 number, since 2×1283893381² = 3296764427551222322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283893301) 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, 357445 + ... + 361018.

It is an arithmetic number, because the mean of its divisors is an integer number (321153408).

Almost surely, 2^1283893381 is an apocalyptic number.

It is an amenable number.

1283893381 is a deficient number, since it is larger than the sum of its proper divisors (720251).

1283893381 is an equidigital number, since it uses as much as digits as its factorization.

1283893381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720250.

The product of its digits is 248832, while the sum is 46.

The square root of 1283893381 is about 35831.4579803837. The cubic root of 1283893381 is about 1086.8667929786.

The spelling of 1283893381 in words is "one billion, two hundred eighty-three million, eight hundred ninety-three thousand, three hundred eighty-one".