9476920781 has 2 divisors, whose sum is σ = 9476920782. Its totient is φ = 9476920780.

The previous prime is 9476920723. The next prime is 9476920829. The reversal of 9476920781 is 1870296749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5106388681 + 4370532100 = 71459^2 + 66110^2 .

It is a cyclic number.

It is not a de Polignac number, because 9476920781 - 2³⁰ = 8403178957 is a prime.

It is a super-2 number, since 2×9476920781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9476920081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4738460390 + 4738460391.

It is an arithmetic number, because the mean of its divisors is an integer number (4738460391).

Almost surely, 2^9476920781 is an apocalyptic number.

It is an amenable number.

9476920781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9476920781 is an equidigital number, since it uses as much as digits as its factorization.

9476920781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 9476920781 is about 97349.4775589474. The cubic root of 9476920781 is about 2116.1953224339.

The spelling of 9476920781 in words is "nine billion, four hundred seventy-six million, nine hundred twenty thousand, seven hundred eighty-one".