2196820949 has 2 divisors, whose sum is σ = 2196820950. Its totient is φ = 2196820948.

The previous prime is 2196820897. The next prime is 2196820957. The reversal of 2196820949 is 9490286912.

It is a happy number.

2196820949 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., 2189584849 + 7236100 = 46793^2 + 2690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2196820949 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 = 2196820897 and 2196820906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2196820049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098410474 + 1098410475.

It is an arithmetic number, because the mean of its divisors is an integer number (1098410475).

Almost surely, 2^2196820949 is an apocalyptic number.

It is an amenable number.

2196820949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196820949 is an equidigital number, since it uses as much as digits as its factorization.

2196820949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 2196820949 is about 46870.2565493299. The cubic root of 2196820949 is about 1299.9646832615.

The spelling of 2196820949 in words is "two billion, one hundred ninety-six million, eight hundred twenty thousand, nine hundred forty-nine".