9849999867 has 4 divisors (see below), whose sum is σ = 13133333160. Its totient is φ = 6566666576.

The previous prime is 9849999857. The next prime is 9849999883. The reversal of 9849999867 is 7689999489.

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

It is a cyclic number.

It is not a de Polignac number, because 9849999867 - 2¹¹ = 9849997819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9849999792 and 9849999801.

It is not an unprimeable number, because it can be changed into a prime (9849999847) 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, 1641666642 + ... + 1641666647.

It is an arithmetic number, because the mean of its divisors is an integer number (3283333290).

Almost surely, 2^9849999867 is an apocalyptic number.

9849999867 is a deficient number, since it is larger than the sum of its proper divisors (3283333293).

9849999867 is a wasteful number, since it uses less digits than its factorization.

9849999867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283333292.

The product of its digits is 634894848, while the sum is 78.

The square root of 9849999867 is about 99247.1655363517. The cubic root of 9849999867 is about 2143.6081926875.

The spelling of 9849999867 in words is "nine billion, eight hundred forty-nine million, nine hundred ninety-nine thousand, eight hundred sixty-seven".