1650830821 has 2 divisors, whose sum is σ = 1650830822. Its totient is φ = 1650830820.

The previous prime is 1650830801. The next prime is 1650830837. The reversal of 1650830821 is 1280380561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1251390625 + 399440196 = 35375^2 + 19986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650830821 - 2¹³ = 1650822629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1650830801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825415410 + 825415411.

It is an arithmetic number, because the mean of its divisors is an integer number (825415411).

Almost surely, 2^1650830821 is an apocalyptic number.

It is an amenable number.

1650830821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650830821 is an equidigital number, since it uses as much as digits as its factorization.

1650830821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1650830821 is about 40630.4174357094. The cubic root of 1650830821 is about 1181.8640510709.

The spelling of 1650830821 in words is "one billion, six hundred fifty million, eight hundred thirty thousand, eight hundred twenty-one".