3216689291 has 2 divisors, whose sum is σ = 3216689292. Its totient is φ = 3216689290.

The previous prime is 3216689257. The next prime is 3216689297. The reversal of 3216689291 is 1929866123.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3216689291 is a prime.

It is not a weakly prime, because it can be changed into another prime (3216689297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608344645 + 1608344646.

It is an arithmetic number, because the mean of its divisors is an integer number (1608344646).

Almost surely, 2^3216689291 is an apocalyptic number.

3216689291 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216689291 is an equidigital number, since it uses as much as digits as its factorization.

3216689291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 3216689291 is about 56715.8645442349. The cubic root of 3216689291 is about 1476.1699867323.

The spelling of 3216689291 in words is "three billion, two hundred sixteen million, six hundred eighty-nine thousand, two hundred ninety-one".