9281420880749 has 2 divisors, whose sum is σ = 9281420880750. Its totient is φ = 9281420880748.

The previous prime is 9281420880727. The next prime is 9281420880757. The reversal of 9281420880749 is 9470880241829.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7646137477225 + 1635283403524 = 2765165^2 + 1278782^2 .

It is a cyclic number.

It is not a de Polignac number, because 9281420880749 - 2²⁰ = 9281419832173 is a prime.

It is a super-2 number, since 2×9281420880749² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9281420880691 and 9281420880700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9281420880449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4640710440374 + 4640710440375.

It is an arithmetic number, because the mean of its divisors is an integer number (4640710440375).

Almost surely, 2^{9281420880749} is an apocalyptic number.

It is an amenable number.

9281420880749 is a deficient number, since it is larger than the sum of its proper divisors (1).

9281420880749 is an equidigital number, since it uses as much as digits as its factorization.

9281420880749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 9281420880749 in words is "nine trillion, two hundred eighty-one billion, four hundred twenty million, eight hundred eighty thousand, seven hundred forty-nine".