3798365821 has 4 divisors (see below), whose sum is σ = 3799339452. Its totient is φ = 3797392192.

The previous prime is 3798365819. The next prime is 3798365839. The reversal of 3798365821 is 1285638973.

3798365821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2987824921 + 810540900 = 54661^2 + 28470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3798365821 - 2¹ = 3798365819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3798365321) 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 in 3 ways as a sum of consecutive naturals, for example, 480940 + ... + 488773.

It is an arithmetic number, because the mean of its divisors is an integer number (949834863).

Almost surely, 2^3798365821 is an apocalyptic number.

It is an amenable number.

3798365821 is a deficient number, since it is larger than the sum of its proper divisors (973631).

3798365821 is an equidigital number, since it uses as much as digits as its factorization.

3798365821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973630.

The product of its digits is 2177280, while the sum is 52.

The square root of 3798365821 is about 61630.8836623328. The cubic root of 3798365821 is about 1560.2670237904.

The spelling of 3798365821 in words is "three billion, seven hundred ninety-eight million, three hundred sixty-five thousand, eight hundred twenty-one".