9409907321 has 2 divisors, whose sum is σ = 9409907322. Its totient is φ = 9409907320.

The previous prime is 9409907293. The next prime is 9409907333. The reversal of 9409907321 is 1237099049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7466860921 + 1943046400 = 86411^2 + 44080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9409907321 is a prime.

It is not a weakly prime, because it can be changed into another prime (9409907621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4704953660 + 4704953661.

It is an arithmetic number, because the mean of its divisors is an integer number (4704953661).

Almost surely, 2^9409907321 is an apocalyptic number.

It is an amenable number.

9409907321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9409907321 is an equidigital number, since it uses as much as digits as its factorization.

9409907321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 9409907321 is about 97004.6767996265. The cubic root of 9409907321 is about 2111.1954862152.

The spelling of 9409907321 in words is "nine billion, four hundred nine million, nine hundred seven thousand, three hundred twenty-one".