9818979249 has 4 divisors (see below), whose sum is σ = 13091972336. Its totient is φ = 6545986164.

The previous prime is 9818979241. The next prime is 9818979251. The reversal of 9818979249 is 9429798189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9818979249 - 2³ = 9818979241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9818979249.

It is not an unprimeable number, because it can be changed into a prime (9818979241) 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, 1636496539 + ... + 1636496544.

It is an arithmetic number, because the mean of its divisors is an integer number (3272993084).

Almost surely, 2^9818979249 is an apocalyptic number.

It is an amenable number.

9818979249 is a deficient number, since it is larger than the sum of its proper divisors (3272993087).

9818979249 is a wasteful number, since it uses less digits than its factorization.

9818979249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272993086.

The product of its digits is 23514624, while the sum is 66.

The square root of 9818979249 is about 99090.7626825023. The cubic root of 9818979249 is about 2141.3555368654.

The spelling of 9818979249 in words is "nine billion, eight hundred eighteen million, nine hundred seventy-nine thousand, two hundred forty-nine".