3216139393 has 2 divisors, whose sum is σ = 3216139394. Its totient is φ = 3216139392.

The previous prime is 3216139391. The next prime is 3216139439. The reversal of 3216139393 is 3939316123.

3216139393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705029264 + 1511110129 = 41292^2 + 38873^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216139393 - 2¹ = 3216139391 is a prime.

Together with 3216139391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3216139391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608069696 + 1608069697.

It is an arithmetic number, because the mean of its divisors is an integer number (1608069697).

Almost surely, 2^3216139393 is an apocalyptic number.

It is an amenable number.

3216139393 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216139393 is an equidigital number, since it uses as much as digits as its factorization.

3216139393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 40.

The square root of 3216139393 is about 56711.0165047321. The cubic root of 3216139393 is about 1476.0858640925.

The spelling of 3216139393 in words is "three billion, two hundred sixteen million, one hundred thirty-nine thousand, three hundred ninety-three".