1959221249 has 2 divisors, whose sum is σ = 1959221250. Its totient is φ = 1959221248.

The previous prime is 1959221239. The next prime is 1959221261. The reversal of 1959221249 is 9421229591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1664068849 + 295152400 = 40793^2 + 17180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959221249 - 2⁸ = 1959220993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1959221239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979610624 + 979610625.

It is an arithmetic number, because the mean of its divisors is an integer number (979610625).

Almost surely, 2^1959221249 is an apocalyptic number.

It is an amenable number.

1959221249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959221249 is an equidigital number, since it uses as much as digits as its factorization.

1959221249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 1959221249 is about 44263.0912725264. The cubic root of 1959221249 is about 1251.2991823524.

The spelling of 1959221249 in words is "one billion, nine hundred fifty-nine million, two hundred twenty-one thousand, two hundred forty-nine".