9999974321 has 2 divisors, whose sum is σ = 9999974322. Its totient is φ = 9999974320.

The previous prime is 9999974269. The next prime is 9999974323. The reversal of 9999974321 is 1234799999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8632453921 + 1367520400 = 92911^2 + 36980^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999974321 - 2¹⁰ = 9999973297 is a prime.

It is a super-2 number, since 2×9999974321² (a number of 21 digits) contains 22 as substring.

Together with 9999974323, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9999974323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999987160 + 4999987161.

It is an arithmetic number, because the mean of its divisors is an integer number (4999987161).

Almost surely, 2^9999974321 is an apocalyptic number.

It is an amenable number.

9999974321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999974321 is an equidigital number, since it uses as much as digits as its factorization.

9999974321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 62.

The square root of 9999974321 is about 99999.8716049176. The cubic root of 9999974321 is about 2154.4328459060.

The spelling of 9999974321 in words is "nine billion, nine hundred ninety-nine million, nine hundred seventy-four thousand, three hundred twenty-one".