6998219449 has 16 divisors (see below), whose sum is σ = 7679178640. Its totient is φ = 6338165760.

The previous prime is 6998219447. The next prime is 6998219483. The reversal of 6998219449 is 9449128996.

It can be written as a sum of positive squares in 8 ways, for example, as 24800400 + 6973419049 = 4980^2 + 83507^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998219449 - 2¹ = 6998219447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6998219447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313549 + ... + 335125.

It is an arithmetic number, because the mean of its divisors is an integer number (479948665).

Almost surely, 2^6998219449 is an apocalyptic number.

It is an amenable number.

6998219449 is a deficient number, since it is larger than the sum of its proper divisors (680959191).

6998219449 is a wasteful number, since it uses less digits than its factorization.

6998219449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22060.

The product of its digits is 10077696, while the sum is 61.

The square root of 6998219449 is about 83655.3611491816. The cubic root of 6998219449 is about 1912.7689751359.

The spelling of 6998219449 in words is "six billion, nine hundred ninety-eight million, two hundred nineteen thousand, four hundred forty-nine".