9774239453729 has 2 divisors, whose sum is σ = 9774239453730. Its totient is φ = 9774239453728.

The previous prime is 9774239453611. The next prime is 9774239453761. The reversal of 9774239453729 is 9273549324779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6567185273104 + 3207054180625 = 2562652^2 + 1790825^2 .

It is a cyclic number.

It is not a de Polignac number, because 9774239453729 - 2¹² = 9774239449633 is a prime.

It is not a weakly prime, because it can be changed into another prime (9774239453789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4887119726864 + 4887119726865.

It is an arithmetic number, because the mean of its divisors is an integer number (4887119726865).

Almost surely, 2^{9774239453729} is an apocalyptic number.

It is an amenable number.

9774239453729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9774239453729 is an equidigital number, since it uses as much as digits as its factorization.

9774239453729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720135360, while the sum is 71.

The spelling of 9774239453729 in words is "nine trillion, seven hundred seventy-four billion, two hundred thirty-nine million, four hundred fifty-three thousand, seven hundred twenty-nine".