2053945921 has 2 divisors, whose sum is σ = 2053945922. Its totient is φ = 2053945920.

The previous prime is 2053945913. The next prime is 2053945991. The reversal of 2053945921 is 1295493502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1741893696 + 312052225 = 41736^2 + 17665^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053945921 - 2³ = 2053945913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2053945991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026972960 + 1026972961.

It is an arithmetic number, because the mean of its divisors is an integer number (1026972961).

Almost surely, 2^2053945921 is an apocalyptic number.

It is an amenable number.

2053945921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053945921 is an equidigital number, since it uses as much as digits as its factorization.

2053945921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 2053945921 is about 45320.4801497072. The cubic root of 2053945921 is about 1271.1486334609.

The spelling of 2053945921 in words is "two billion, fifty-three million, nine hundred forty-five thousand, nine hundred twenty-one".