9747355381 has 2 divisors, whose sum is σ = 9747355382. Its totient is φ = 9747355380.

The previous prime is 9747355363. The next prime is 9747355477. The reversal of 9747355381 is 1835537479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7927053156 + 1820302225 = 89034^2 + 42665^2 .

It is an emirp because it is prime and its reverse (1835537479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9747355381 - 2⁵ = 9747355349 is a prime.

It is a super-2 number, since 2×9747355381² (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 (9747355361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4873677690 + 4873677691.

It is an arithmetic number, because the mean of its divisors is an integer number (4873677691).

Almost surely, 2^9747355381 is an apocalyptic number.

It is an amenable number.

9747355381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9747355381 is an equidigital number, since it uses as much as digits as its factorization.

9747355381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The square root of 9747355381 is about 98728.6958335822. The cubic root of 9747355381 is about 2136.1361686075.

The spelling of 9747355381 in words is "nine billion, seven hundred forty-seven million, three hundred fifty-five thousand, three hundred eighty-one".