9618752981 has 2 divisors, whose sum is σ = 9618752982. Its totient is φ = 9618752980.

The previous prime is 9618752951. The next prime is 9618752987. The reversal of 9618752981 is 1892578169.

9618752981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8035508881 + 1583244100 = 89641^2 + 39790^2 .

It is an emirp because it is prime and its reverse (1892578169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9618752981 - 2¹⁸ = 9618490837 is a prime.

It is a super-2 number, since 2×9618752981² (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 (9618752987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4809376490 + 4809376491.

It is an arithmetic number, because the mean of its divisors is an integer number (4809376491).

Almost surely, 2^9618752981 is an apocalyptic number.

It is an amenable number.

9618752981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9618752981 is an equidigital number, since it uses as much as digits as its factorization.

9618752981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 56.

The square root of 9618752981 is about 98075.2414271818. The cubic root of 9618752981 is about 2126.7001282256.

The spelling of 9618752981 in words is "nine billion, six hundred eighteen million, seven hundred fifty-two thousand, nine hundred eighty-one".