2100719449 has 2 divisors, whose sum is σ = 2100719450. Its totient is φ = 2100719448.

The previous prime is 2100719447. The next prime is 2100719483. The reversal of 2100719449 is 9449170012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178686224 + 922033225 = 34332^2 + 30365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100719449 - 2¹ = 2100719447 is a prime.

Together with 2100719447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2100719443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050359724 + 1050359725.

It is an arithmetic number, because the mean of its divisors is an integer number (1050359725).

Almost surely, 2^2100719449 is an apocalyptic number.

It is an amenable number.

2100719449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100719449 is an equidigital number, since it uses as much as digits as its factorization.

2100719449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2100719449 is about 45833.6061094913. The cubic root of 2100719449 is about 1280.7253881950.

The spelling of 2100719449 in words is "two billion, one hundred million, seven hundred nineteen thousand, four hundred forty-nine".