9817948849 has 2 divisors, whose sum is σ = 9817948850. Its totient is φ = 9817948848.

The previous prime is 9817948781. The next prime is 9817948883. The reversal of 9817948849 is 9488497189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9364045824 + 453903025 = 96768^2 + 21305^2 .

It is a cyclic number.

It is not a de Polignac number, because 9817948849 - 2¹⁷ = 9817817777 is a prime.

It is not a weakly prime, because it can be changed into another prime (9817948549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4908974424 + 4908974425.

It is an arithmetic number, because the mean of its divisors is an integer number (4908974425).

Almost surely, 2^9817948849 is an apocalyptic number.

It is an amenable number.

9817948849 is a deficient number, since it is larger than the sum of its proper divisors (1).

9817948849 is an equidigital number, since it uses as much as digits as its factorization.

9817948849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 67.

The square root of 9817948849 is about 99085.5632723557. The cubic root of 9817948849 is about 2141.2806298961.

The spelling of 9817948849 in words is "nine billion, eight hundred seventeen million, nine hundred forty-eight thousand, eight hundred forty-nine".