981056721319 has 2 divisors, whose sum is σ = 981056721320. Its totient is φ = 981056721318.

The previous prime is 981056721299. The next prime is 981056721343. The reversal of 981056721319 is 913127650189.

981056721319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981056721319 - 2⁵ = 981056721287 is a prime.

It is a super-2 number, since 2×981056721319² (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 (981056721919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490528360659 + 490528360660.

It is an arithmetic number, because the mean of its divisors is an integer number (490528360660).

Almost surely, 2^981056721319 is an apocalyptic number.

981056721319 is a deficient number, since it is larger than the sum of its proper divisors (1).

981056721319 is an equidigital number, since it uses as much as digits as its factorization.

981056721319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 981056721319 in words is "nine hundred eighty-one billion, fifty-six million, seven hundred twenty-one thousand, three hundred nineteen".