6990913 has 2 divisors, whose sum is σ = 6990914. Its totient is φ = 6990912.

The previous prime is 6990911. The next prime is 6990923. The reversal of 6990913 is 3190996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6265009 + 725904 = 2503^2 + 852^2 .

It is a cyclic number.

It is not a de Polignac number, because 6990913 - 2¹ = 6990911 is a prime.

Together with 6990911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6990911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495456 + 3495457.

It is an arithmetic number, because the mean of its divisors is an integer number (3495457).

Almost surely, 2^6990913 is an apocalyptic number.

It is an amenable number.

6990913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990913 is an equidigital number, since it uses as much as digits as its factorization.

6990913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 6990913 is about 2644.0334718002. The cubic root of 6990913 is about 191.2103071683.

The spelling of 6990913 in words is "six million, nine hundred ninety thousand, nine hundred thirteen".