3221078369 has 2 divisors, whose sum is σ = 3221078370. Its totient is φ = 3221078368.

The previous prime is 3221078363. The next prime is 3221078407. The reversal of 3221078369 is 9638701223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1614030625 + 1607047744 = 40175^2 + 40088^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221078369 - 2¹² = 3221074273 is a prime.

It is a super-2 number, since 2×3221078369² = 20750691718479400322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3221078363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610539184 + 1610539185.

It is an arithmetic number, because the mean of its divisors is an integer number (1610539185).

Almost surely, 2^3221078369 is an apocalyptic number.

It is an amenable number.

3221078369 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221078369 is an equidigital number, since it uses as much as digits as its factorization.

3221078369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 3221078369 is about 56754.5449193278. The cubic root of 3221078369 is about 1476.8410784507.

The spelling of 3221078369 in words is "three billion, two hundred twenty-one million, seventy-eight thousand, three hundred sixty-nine".