3793781021 has 2 divisors, whose sum is σ = 3793781022. Its totient is φ = 3793781020.

The previous prime is 3793781011. The next prime is 3793781063. The reversal of 3793781021 is 1201873973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3710515396 + 83265625 = 60914^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 3793781021 - 2³⁰ = 2720039197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3793781021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3793781011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1896890510 + 1896890511.

It is an arithmetic number, because the mean of its divisors is an integer number (1896890511).

Almost surely, 2^3793781021 is an apocalyptic number.

It is an amenable number.

3793781021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3793781021 is an equidigital number, since it uses as much as digits as its factorization.

3793781021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 3793781021 is about 61593.6767939697. The cubic root of 3793781021 is about 1559.6389999924.

The spelling of 3793781021 in words is "three billion, seven hundred ninety-three million, seven hundred eighty-one thousand, twenty-one".