6993567613 has 2 divisors, whose sum is σ = 6993567614. Its totient is φ = 6993567612.

The previous prime is 6993567583. The next prime is 6993567631. The reversal of 6993567613 is 3167653996.

Together with next prime (6993567631) 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., 6971081049 + 22486564 = 83493^2 + 4742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6993567613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6993567653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3496783806 + 3496783807.

It is an arithmetic number, because the mean of its divisors is an integer number (3496783807).

Almost surely, 2^6993567613 is an apocalyptic number.

It is an amenable number.

6993567613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6993567613 is an equidigital number, since it uses as much as digits as its factorization.

6993567613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 55.

The square root of 6993567613 is about 83627.5529535571. The cubic root of 6993567613 is about 1912.3450644590.

The spelling of 6993567613 in words is "six billion, nine hundred ninety-three million, five hundred sixty-seven thousand, six hundred thirteen".