9745430921 has 2 divisors, whose sum is σ = 9745430922. Its totient is φ = 9745430920.

The previous prime is 9745430911. The next prime is 9745430941. The reversal of 9745430921 is 1290345479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6972250000 + 2773180921 = 83500^2 + 52661^2 .

It is a cyclic number.

It is not a de Polignac number, because 9745430921 - 2⁶ = 9745430857 is a prime.

It is not a weakly prime, because it can be changed into another prime (9745430911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4872715460 + 4872715461.

It is an arithmetic number, because the mean of its divisors is an integer number (4872715461).

Almost surely, 2^9745430921 is an apocalyptic number.

It is an amenable number.

9745430921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9745430921 is an equidigital number, since it uses as much as digits as its factorization.

9745430921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 9745430921 is about 98718.9491485804. The cubic root of 9745430921 is about 2135.9955773386.

The spelling of 9745430921 in words is "nine billion, seven hundred forty-five million, four hundred thirty thousand, nine hundred twenty-one".