2198847797 has 4 divisors (see below), whose sum is σ = 2198953836. Its totient is φ = 2198741760.

The previous prime is 2198847793. The next prime is 2198847799. The reversal of 2198847797 is 7977488912.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 721137316 + 1477710481 = 26854^2 + 38441^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198847797 - 2² = 2198847793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198847793) 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, 10604 + ... + 67157.

It is an arithmetic number, because the mean of its divisors is an integer number (549738459).

Almost surely, 2^2198847797 is an apocalyptic number.

It is an amenable number.

2198847797 is a deficient number, since it is larger than the sum of its proper divisors (106039).

2198847797 is an equidigital number, since it uses as much as digits as its factorization.

2198847797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106038.

The product of its digits is 14224896, while the sum is 62.

The square root of 2198847797 is about 46891.8734643861. The cubic root of 2198847797 is about 1300.3643548736.

The spelling of 2198847797 in words is "two billion, one hundred ninety-eight million, eight hundred forty-seven thousand, seven hundred ninety-seven".