2104963921 has 2 divisors, whose sum is σ = 2104963922. Its totient is φ = 2104963920.

The previous prime is 2104963879. The next prime is 2104963943. The reversal of 2104963921 is 1293694012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1578949696 + 526014225 = 39736^2 + 22935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104963921 - 2¹³ = 2104955729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2104963981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052481960 + 1052481961.

It is an arithmetic number, because the mean of its divisors is an integer number (1052481961).

Almost surely, 2^2104963921 is an apocalyptic number.

It is an amenable number.

2104963921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104963921 is an equidigital number, since it uses as much as digits as its factorization.

2104963921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2104963921 is about 45879.8857997707. The cubic root of 2104963921 is about 1281.5873700327.

The spelling of 2104963921 in words is "two billion, one hundred four million, nine hundred sixty-three thousand, nine hundred twenty-one".