9938646693 has 12 divisors (see below), whose sum is σ = 14358279468. Its totient is φ = 6624630720.

The previous prime is 9938646671. The next prime is 9938646733. The reversal of 9938646693 is 3966468399.

9938646693 is a `hidden beast` number, since 9 + 9 + 3 + 86 + 466 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3368409444 + 6570237249 = 58038^2 + 81057^2 .

It is not a de Polignac number, because 9938646693 - 2⁵ = 9938646661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9938646693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938646623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37128 + ... + 145793.

It is an arithmetic number, because the mean of its divisors is an integer number (1196523289).

Almost surely, 2^9938646693 is an apocalyptic number.

It is an amenable number.

9938646693 is a deficient number, since it is larger than the sum of its proper divisors (4419632775).

9938646693 is a wasteful number, since it uses less digits than its factorization.

9938646693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188964 (or 188961 counting only the distinct ones).

The product of its digits is 45349632, while the sum is 63.

The square root of 9938646693 is about 99692.7614874821. The cubic root of 9938646693 is about 2150.0195918893.

The spelling of 9938646693 in words is "nine billion, nine hundred thirty-eight million, six hundred forty-six thousand, six hundred ninety-three".