6993517 has 2 divisors, whose sum is σ = 6993518. Its totient is φ = 6993516.

The previous prime is 6993499. The next prime is 6993523. The reversal of 6993517 is 7153996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4541161 + 2452356 = 2131^2 + 1566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6993517 is a prime.

6993517 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6993517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6993557) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3496758 + 3496759.

It is an arithmetic number, because the mean of its divisors is an integer number (3496759).

Almost surely, 2^6993517 is an apocalyptic number.

It is an amenable number.

6993517 is a deficient number, since it is larger than the sum of its proper divisors (1).

6993517 is an equidigital number, since it uses as much as digits as its factorization.

6993517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 40.

The square root of 6993517 is about 2644.5258554229. The cubic root of 6993517 is about 191.2340451184.

The spelling of 6993517 in words is "six million, nine hundred ninety-three thousand, five hundred seventeen".