2100000449 has 2 divisors, whose sum is σ = 2100000450. Its totient is φ = 2100000448.

The previous prime is 2100000407. The next prime is 2100000493. The reversal of 2100000449 is 9440000012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1281640000 + 818360449 = 35800^2 + 28607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100000449 - 2¹⁶ = 2099934913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100000449.

It is not a weakly prime, because it can be changed into another prime (2100000949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050000224 + 1050000225.

It is an arithmetic number, because the mean of its divisors is an integer number (1050000225).

Almost surely, 2^2100000449 is an apocalyptic number.

It is an amenable number.

2100000449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100000449 is an equidigital number, since it uses as much as digits as its factorization.

2100000449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2100000449 is about 45825.7618485498. The cubic root of 2100000449 is about 1280.5792562542.

The spelling of 2100000449 in words is "two billion, one hundred million, four hundred forty-nine", and thus it is an aban number.