6899903993 has 2 divisors, whose sum is σ = 6899903994. Its totient is φ = 6899903992.

The previous prime is 6899903971. The next prime is 6899904001. The reversal of 6899903993 is 3993099986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5061895609 + 1838008384 = 71147^2 + 42872^2 .

It is a cyclic number.

It is not a de Polignac number, because 6899903993 - 2⁸ = 6899903737 is a prime.

It is a super-2 number, since 2×6899903993² = 95217350225234688098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6899903963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449951996 + 3449951997.

It is an arithmetic number, because the mean of its divisors is an integer number (3449951997).

Almost surely, 2^6899903993 is an apocalyptic number.

It is an amenable number.

6899903993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6899903993 is an equidigital number, since it uses as much as digits as its factorization.

6899903993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25509168, while the sum is 65.

The square root of 6899903993 is about 83065.6607329407. The cubic root of 6899903993 is about 1903.7694321620.

The spelling of 6899903993 in words is "six billion, eight hundred ninety-nine million, nine hundred three thousand, nine hundred ninety-three".