6998600809 has 4 divisors (see below), whose sum is σ = 7366948240. Its totient is φ = 6630253380.

The previous prime is 6998600743. The next prime is 6998600813. The reversal of 6998600809 is 9080068996.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6998600809 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 6998600809.

It is not an unprimeable number, because it can be changed into a prime (6998600849) 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, 184173687 + ... + 184173724.

It is an arithmetic number, because the mean of its divisors is an integer number (1841737060).

Almost surely, 2^6998600809 is an apocalyptic number.

It is an amenable number.

6998600809 is a deficient number, since it is larger than the sum of its proper divisors (368347431).

6998600809 is a wasteful number, since it uses less digits than its factorization.

6998600809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368347430.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The square root of 6998600809 is about 83657.6404699535. The cubic root of 6998600809 is about 1912.8037192272.

The spelling of 6998600809 in words is "six billion, nine hundred ninety-eight million, six hundred thousand, eight hundred nine".