1283194304981 has 2 divisors, whose sum is σ = 1283194304982. Its totient is φ = 1283194304980.

The previous prime is 1283194304969. The next prime is 1283194305013. The reversal of 1283194304981 is 1894034913821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745098702481 + 538095602500 = 863191^2 + 733550^2 .

It is an emirp because it is prime and its reverse (1894034913821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1283194304981 - 2²² = 1283190110677 is a prime.

It is a super-2 number, since 2×1283194304981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283194304681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641597152490 + 641597152491.

It is an arithmetic number, because the mean of its divisors is an integer number (641597152491).

Almost surely, 2^{1283194304981} is an apocalyptic number.

It is an amenable number.

1283194304981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283194304981 is an equidigital number, since it uses as much as digits as its factorization.

1283194304981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 1283194304981 in words is "one trillion, two hundred eighty-three billion, one hundred ninety-four million, three hundred four thousand, nine hundred eighty-one".