9386743021 has 2 divisors, whose sum is σ = 9386743022. Its totient is φ = 9386743020.

The previous prime is 9386743019. The next prime is 9386743031. The reversal of 9386743021 is 1203476839.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6413767396 + 2972975625 = 80086^2 + 54525^2 .

It is an emirp because it is prime and its reverse (1203476839) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9386743021 - 2¹ = 9386743019 is a prime.

It is a super-2 number, since 2×9386743021² (a number of 21 digits) contains 22 as substring.

Together with 9386743019, 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 (9386743031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4693371510 + 4693371511.

It is an arithmetic number, because the mean of its divisors is an integer number (4693371511).

Almost surely, 2^9386743021 is an apocalyptic number.

It is an amenable number.

9386743021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9386743021 is an equidigital number, since it uses as much as digits as its factorization.

9386743021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 9386743021 is about 96885.2053772917. The cubic root of 9386743021 is about 2109.4616912522.

The spelling of 9386743021 in words is "nine billion, three hundred eighty-six million, seven hundred forty-three thousand, twenty-one".