2198769649 has 2 divisors, whose sum is σ = 2198769650. Its totient is φ = 2198769648.

The previous prime is 2198769593. The next prime is 2198769667. The reversal of 2198769649 is 9469678912.

2198769649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1854852624 + 343917025 = 43068^2 + 18545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198769649 - 2¹¹ = 2198767601 is a prime.

It is not a weakly prime, because it can be changed into another prime (2198769049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099384824 + 1099384825.

It is an arithmetic number, because the mean of its divisors is an integer number (1099384825).

Almost surely, 2^2198769649 is an apocalyptic number.

It is an amenable number.

2198769649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198769649 is an equidigital number, since it uses as much as digits as its factorization.

2198769649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The square root of 2198769649 is about 46891.0401782686. The cubic root of 2198769649 is about 1300.3489495209.

The spelling of 2198769649 in words is "two billion, one hundred ninety-eight million, seven hundred sixty-nine thousand, six hundred forty-nine".