9494973181 has 2 divisors, whose sum is σ = 9494973182. Its totient is φ = 9494973180.

The previous prime is 9494973179. The next prime is 9494973211. The reversal of 9494973181 is 1813794949.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5135012281 + 4359960900 = 71659^2 + 66030^2 .

It is a cyclic number.

It is not a de Polignac number, because 9494973181 - 2¹ = 9494973179 is a prime.

It is a super-2 number, since 2×9494973181² (a number of 21 digits) contains 22 as substring.

Together with 9494973179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9494973881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4747486590 + 4747486591.

It is an arithmetic number, because the mean of its divisors is an integer number (4747486591).

Almost surely, 2^9494973181 is an apocalyptic number.

It is an amenable number.

9494973181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9494973181 is an equidigital number, since it uses as much as digits as its factorization.

9494973181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 9494973181 is about 97442.1529985868. The cubic root of 9494973181 is about 2117.5381697559.

The spelling of 9494973181 in words is "nine billion, four hundred ninety-four million, nine hundred seventy-three thousand, one hundred eighty-one".