9821430061 has 2 divisors, whose sum is σ = 9821430062. Its totient is φ = 9821430060.

The previous prime is 9821430023. The next prime is 9821430079. The reversal of 9821430061 is 1600341289.

9821430061 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9738729225 + 82700836 = 98685^2 + 9094^2 .

It is an emirp because it is prime and its reverse (1600341289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9821430061 - 2¹⁷ = 9821298989 is a prime.

It is a super-2 number, since 2×9821430061² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9821429999 and 9821430026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9821430161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4910715030 + 4910715031.

It is an arithmetic number, because the mean of its divisors is an integer number (4910715031).

Almost surely, 2^9821430061 is an apocalyptic number.

It is an amenable number.

9821430061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9821430061 is an equidigital number, since it uses as much as digits as its factorization.

9821430061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 9821430061 is about 99103.1284117711. The cubic root of 9821430061 is about 2141.5336824457.

The spelling of 9821430061 in words is "nine billion, eight hundred twenty-one million, four hundred thirty thousand, sixty-one".