9421879399 has 2 divisors, whose sum is σ = 9421879400. Its totient is φ = 9421879398.

The previous prime is 9421879387. The next prime is 9421879421. The reversal of 9421879399 is 9939781249.

9421879399 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 is a cyclic number.

It is not a de Polignac number, because 9421879399 - 2¹⁷ = 9421748327 is a prime.

It is a super-2 number, since 2×9421879399² (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 (9421879099) 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, 4710939699 + 4710939700.

It is an arithmetic number, because the mean of its divisors is an integer number (4710939700).

Almost surely, 2^9421879399 is an apocalyptic number.

9421879399 is a deficient number, since it is larger than the sum of its proper divisors (1).

9421879399 is an equidigital number, since it uses as much as digits as its factorization.

9421879399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 61.

The square root of 9421879399 is about 97066.3659513428. The cubic root of 9421879399 is about 2112.0904537772.

The spelling of 9421879399 in words is "nine billion, four hundred twenty-one million, eight hundred seventy-nine thousand, three hundred ninety-nine".