6993993997 has 2 divisors, whose sum is σ = 6993993998. Its totient is φ = 6993993996.

The previous prime is 6993993971. The next prime is 6993994039. The reversal of 6993993997 is 7993993996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5572025316 + 1421968681 = 74646^2 + 37709^2 .

It is a cyclic number.

It is not a de Polignac number, because 6993993997 - 2¹⁹ = 6993469709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6993993967) 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, 3496996998 + 3496996999.

It is an arithmetic number, because the mean of its divisors is an integer number (3496996999).

Almost surely, 2^6993993997 is an apocalyptic number.

It is an amenable number.

6993993997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6993993997 is an equidigital number, since it uses as much as digits as its factorization.

6993993997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200884698, while the sum is 73.

The square root of 6993993997 is about 83630.1022180411. The cubic root of 6993993997 is about 1912.3839276359.

Subtracting 6993993997 from its reverse (7993993996), we obtain a palindrome (999999999).

The spelling of 6993993997 in words is "six billion, nine hundred ninety-three million, nine hundred ninety-three thousand, nine hundred ninety-seven".