2199877649 has 2 divisors, whose sum is σ = 2199877650. Its totient is φ = 2199877648.

The previous prime is 2199877607. The next prime is 2199877663. The reversal of 2199877649 is 9467789912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2118300625 + 81577024 = 46025^2 + 9032^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199877649 - 2²⁸ = 1931442193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2199877591 and 2199877600.

It is not a weakly prime, because it can be changed into another prime (2199877049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099938824 + 1099938825.

It is an arithmetic number, because the mean of its divisors is an integer number (1099938825).

Almost surely, 2^2199877649 is an apocalyptic number.

It is an amenable number.

2199877649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199877649 is an equidigital number, since it uses as much as digits as its factorization.

2199877649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 62.

The square root of 2199877649 is about 46902.8533140576. The cubic root of 2199877649 is about 1300.5673360008.

The spelling of 2199877649 in words is "two billion, one hundred ninety-nine million, eight hundred seventy-seven thousand, six hundred forty-nine".