8197898979 has 8 divisors (see below), whose sum is σ = 10931108112. Its totient is φ = 5464977920.

The previous prime is 8197898971. The next prime is 8197898981. The reversal of 8197898979 is 9798987918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8197898979 - 2³ = 8197898971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8197898979.

It is not an unprimeable number, because it can be changed into a prime (8197898971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6667 + ... + 128219.

It is an arithmetic number, because the mean of its divisors is an integer number (1366388514).

Almost surely, 2^8197898979 is an apocalyptic number.

8197898979 is a deficient number, since it is larger than the sum of its proper divisors (2733209133).

8197898979 is a wasteful number, since it uses less digits than its factorization.

8197898979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144037.

The product of its digits is 164602368, while the sum is 75.

The square root of 8197898979 is about 90542.2496904070. The cubic root of 8197898979 is about 2016.3574340353.

The spelling of 8197898979 in words is "eight billion, one hundred ninety-seven million, eight hundred ninety-eight thousand, nine hundred seventy-nine".