2198344639 has 4 divisors (see below), whose sum is σ = 2218890024. Its totient is φ = 2177799256.

The previous prime is 2198344627. The next prime is 2198344663. The reversal of 2198344639 is 9364438912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2198344639 - 2¹¹ = 2198342591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2198344592 and 2198344601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198344609) 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, 10272532 + ... + 10272745.

It is an arithmetic number, because the mean of its divisors is an integer number (554722506).

Almost surely, 2^2198344639 is an apocalyptic number.

2198344639 is a deficient number, since it is larger than the sum of its proper divisors (20545385).

2198344639 is a wasteful number, since it uses less digits than its factorization.

2198344639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20545384.

The product of its digits is 1119744, while the sum is 49.

The square root of 2198344639 is about 46886.5080700195. The cubic root of 2198344639 is about 1300.2651607045.

The spelling of 2198344639 in words is "two billion, one hundred ninety-eight million, three hundred forty-four thousand, six hundred thirty-nine".