9641707639 has 2 divisors, whose sum is σ = 9641707640. Its totient is φ = 9641707638.

The previous prime is 9641707631. The next prime is 9641707657. The reversal of 9641707639 is 9367071469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9641707639 - 2³ = 9641707631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9641707631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820853819 + 4820853820.

It is an arithmetic number, because the mean of its divisors is an integer number (4820853820).

Almost surely, 2^9641707639 is an apocalyptic number.

9641707639 is a deficient number, since it is larger than the sum of its proper divisors (1).

9641707639 is an equidigital number, since it uses as much as digits as its factorization.

9641707639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 9641707639 is about 98192.1974446035. The cubic root of 9641707639 is about 2128.3905376440.

The spelling of 9641707639 in words is "nine billion, six hundred forty-one million, seven hundred seven thousand, six hundred thirty-nine".