9938765849 has 4 divisors (see below), whose sum is σ = 9963066420. Its totient is φ = 9914465280.

The previous prime is 9938765839. The next prime is 9938765857. The reversal of 9938765849 is 9485678399.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5091821449 + 4846944400 = 71357^2 + 69620^2 .

It is a cyclic number.

It is not a de Polignac number, because 9938765849 - 2¹² = 9938761753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9938765839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12149672 + ... + 12150489.

It is an arithmetic number, because the mean of its divisors is an integer number (2490766605).

Almost surely, 2^9938765849 is an apocalyptic number.

It is an amenable number.

9938765849 is a deficient number, since it is larger than the sum of its proper divisors (24300571).

9938765849 is a wasteful number, since it uses less digits than its factorization.

9938765849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24300570.

The product of its digits is 117573120, while the sum is 68.

The square root of 9938765849 is about 99693.3591017977. The cubic root of 9938765849 is about 2150.0281841627.

The spelling of 9938765849 in words is "nine billion, nine hundred thirty-eight million, seven hundred sixty-five thousand, eight hundred forty-nine".