9372818381 has 2 divisors, whose sum is σ = 9372818382. Its totient is φ = 9372818380.

The previous prime is 9372818353. The next prime is 9372818419. The reversal of 9372818381 is 1838182739.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8620194025 + 752624356 = 92845^2 + 27434^2 .

It is an emirp because it is prime and its reverse (1838182739) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9372818381 is a prime.

It is a super-2 number, since 2×9372818381² (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 (9372818881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4686409190 + 4686409191.

It is an arithmetic number, because the mean of its divisors is an integer number (4686409191).

Almost surely, 2^9372818381 is an apocalyptic number.

It is an amenable number.

9372818381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9372818381 is an equidigital number, since it uses as much as digits as its factorization.

9372818381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 9372818381 is about 96813.3171676294. The cubic root of 9372818381 is about 2108.4180906787.

The spelling of 9372818381 in words is "nine billion, three hundred seventy-two million, eight hundred eighteen thousand, three hundred eighty-one".