9678675891 has 4 divisors (see below), whose sum is σ = 12904901192. Its totient is φ = 6452450592.

The previous prime is 9678675859. The next prime is 9678675907. The reversal of 9678675891 is 1985768769.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1985768769 = 3 ⋅661922923.

It is not a de Polignac number, because 9678675891 - 2⁵ = 9678675859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9678675091) 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, 1613112646 + ... + 1613112651.

It is an arithmetic number, because the mean of its divisors is an integer number (3226225298).

Almost surely, 2^9678675891 is an apocalyptic number.

9678675891 is a deficient number, since it is larger than the sum of its proper divisors (3226225301).

9678675891 is a wasteful number, since it uses less digits than its factorization.

9678675891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226225300.

The product of its digits is 45722880, while the sum is 66.

The square root of 9678675891 is about 98380.2616941020. The cubic root of 9678675891 is about 2131.1072946178.

The spelling of 9678675891 in words is "nine billion, six hundred seventy-eight million, six hundred seventy-five thousand, eight hundred ninety-one".