3681370321 has 2 divisors, whose sum is σ = 3681370322. Its totient is φ = 3681370320.

The previous prime is 3681370243. The next prime is 3681370333. The reversal of 3681370321 is 1230731863.

3681370321 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2867067025 + 814303296 = 53545^2 + 28536^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681370321 - 2⁷ = 3681370193 is a prime.

It is not a weakly prime, because it can be changed into another prime (3681370391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840685160 + 1840685161.

It is an arithmetic number, because the mean of its divisors is an integer number (1840685161).

Almost surely, 2^3681370321 is an apocalyptic number.

It is an amenable number.

3681370321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681370321 is an equidigital number, since it uses as much as digits as its factorization.

3681370321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3681370321 is about 60674.2970375430. The cubic root of 3681370321 is about 1544.0801345974.

The spelling of 3681370321 in words is "three billion, six hundred eighty-one million, three hundred seventy thousand, three hundred twenty-one".