3213447397 has 2 divisors, whose sum is σ = 3213447398. Its totient is φ = 3213447396.

The previous prime is 3213447379. The next prime is 3213447401. The reversal of 3213447397 is 7937443123.

Together with previous prime (3213447379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2069249121 + 1144198276 = 45489^2 + 33826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3213447397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3213447317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606723698 + 1606723699.

It is an arithmetic number, because the mean of its divisors is an integer number (1606723699).

Almost surely, 2^3213447397 is an apocalyptic number.

It is an amenable number.

3213447397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213447397 is an equidigital number, since it uses as much as digits as its factorization.

3213447397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 43.

The square root of 3213447397 is about 56687.2772057364. The cubic root of 3213447397 is about 1475.6739078154.

The spelling of 3213447397 in words is "three billion, two hundred thirteen million, four hundred forty-seven thousand, three hundred ninety-seven".