3213566647987 has 2 divisors, whose sum is σ = 3213566647988. Its totient is φ = 3213566647986.

The previous prime is 3213566647937. The next prime is 3213566648009. The reversal of 3213566647987 is 7897466653123.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3213566647987 is a prime.

It is not a weakly prime, because it can be changed into another prime (3213566647937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606783323993 + 1606783323994.

It is an arithmetic number, because the mean of its divisors is an integer number (1606783323994).

Almost surely, 2^{3213566647987} is an apocalyptic number.

3213566647987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213566647987 is an equidigital number, since it uses as much as digits as its factorization.

3213566647987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274337280, while the sum is 67.

The spelling of 3213566647987 in words is "three trillion, two hundred thirteen billion, five hundred sixty-six million, six hundred forty-seven thousand, nine hundred eighty-seven".