9838678691 has 4 divisors (see below), whose sum is σ = 10024314192. Its totient is φ = 9653043192.

The previous prime is 9838678609. The next prime is 9838678711. The reversal of 9838678691 is 1968768389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1968768389 = 7 ⋅281252627.

It is a cyclic number.

It is not a de Polignac number, because 9838678691 - 2¹⁴ = 9838662307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9838678601) 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, 92817671 + ... + 92817776.

It is an arithmetic number, because the mean of its divisors is an integer number (2506078548).

Almost surely, 2^9838678691 is an apocalyptic number.

9838678691 is a deficient number, since it is larger than the sum of its proper divisors (185635501).

9838678691 is a wasteful number, since it uses less digits than its factorization.

9838678691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185635500.

The product of its digits is 31352832, while the sum is 65.

The square root of 9838678691 is about 99190.1138773416. The cubic root of 9838678691 is about 2142.7866201157.

The spelling of 9838678691 in words is "nine billion, eight hundred thirty-eight million, six hundred seventy-eight thousand, six hundred ninety-one".