3216397 has 4 divisors (see below), whose sum is σ = 3223836. Its totient is φ = 3208960.

The previous prime is 3216359. The next prime is 3216403. The reversal of 3216397 is 7936123.

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 826281 + 2390116 = 909^2 + 1546^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216397 - 2¹¹ = 3214349 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 (3216337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (805959).

Almost surely, 2^3216397 is an apocalyptic number.

It is an amenable number.

3216397 is a deficient number, since it is larger than the sum of its proper divisors (7439).

3216397 is an equidigital number, since it uses as much as digits as its factorization.

3216397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438.

The product of its digits is 6804, while the sum is 31.

The square root of 3216397 is about 1793.4316267982. The cubic root of 3216397 is about 147.6125273651.

The spelling of 3216397 in words is "three million, two hundred sixteen thousand, three hundred ninety-seven".