9399366421 has 2 divisors, whose sum is σ = 9399366422. Its totient is φ = 9399366420.

The previous prime is 9399366409. The next prime is 9399366467. The reversal of 9399366421 is 1246639939.

9399366421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8352132100 + 1047234321 = 91390^2 + 32361^2 .

It is a cyclic number.

It is not a de Polignac number, because 9399366421 - 2⁷ = 9399366293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9399364421) 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, 4699683210 + 4699683211.

It is an arithmetic number, because the mean of its divisors is an integer number (4699683211).

Almost surely, 2^9399366421 is an apocalyptic number.

It is an amenable number.

9399366421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9399366421 is an equidigital number, since it uses as much as digits as its factorization.

9399366421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 52.

The square root of 9399366421 is about 96950.3296590579. The cubic root of 9399366421 is about 2110.4068771297.

The spelling of 9399366421 in words is "nine billion, three hundred ninety-nine million, three hundred sixty-six thousand, four hundred twenty-one".