4084825621 has 2 divisors, whose sum is σ = 4084825622. Its totient is φ = 4084825620.

The previous prime is 4084825583. The next prime is 4084825631. The reversal of 4084825621 is 1265284804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2231523121 + 1853302500 = 47239^2 + 43050^2 .

It is a cyclic number.

It is not a de Polignac number, because 4084825621 - 2²¹ = 4082728469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4084825631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2042412810 + 2042412811.

It is an arithmetic number, because the mean of its divisors is an integer number (2042412811).

Almost surely, 2^4084825621 is an apocalyptic number.

It is an amenable number.

4084825621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4084825621 is an equidigital number, since it uses as much as digits as its factorization.

4084825621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 4084825621 is about 63912.6405416018. The cubic root of 4084825621 is about 1598.5436775897.

The spelling of 4084825621 in words is "four billion, eighty-four million, eight hundred twenty-five thousand, six hundred twenty-one".