9425665309 has 2 divisors, whose sum is σ = 9425665310. Its totient is φ = 9425665308.

The previous prime is 9425665247. The next prime is 9425665343. The reversal of 9425665309 is 9035665249.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8018665209 + 1407000100 = 89547^2 + 37510^2 .

It is a cyclic number.

It is not a de Polignac number, because 9425665309 - 2⁹ = 9425664797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9425665009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4712832654 + 4712832655.

It is an arithmetic number, because the mean of its divisors is an integer number (4712832655).

Almost surely, 2^9425665309 is an apocalyptic number.

It is an amenable number.

9425665309 is a deficient number, since it is larger than the sum of its proper divisors (1).

9425665309 is an equidigital number, since it uses as much as digits as its factorization.

9425665309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The square root of 9425665309 is about 97085.8656499493. The cubic root of 9425665309 is about 2112.3733100686.

The spelling of 9425665309 in words is "nine billion, four hundred twenty-five million, six hundred sixty-five thousand, three hundred nine".