6997563 has 8 divisors (see below), whose sum is σ = 10366800. Its totient is φ = 4665024.

The previous prime is 6997559. The next prime is 6997579. The reversal of 6997563 is 3657996.

It is not a de Polignac number, because 6997563 - 2² = 6997559 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 9⁶ + 9⁷ + 7² + 5 + 6⁸ + 3⁷ .

It is not an unprimeable number, because it can be changed into a prime (6997513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129558 + ... + 129611.

It is an arithmetic number, because the mean of its divisors is an integer number (1295850).

Almost surely, 2^6997563 is an apocalyptic number.

6997563 is a deficient number, since it is larger than the sum of its proper divisors (3369237).

6997563 is a wasteful number, since it uses less digits than its factorization.

6997563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259178 (or 259172 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 6997563 is about 2645.2907212630. The cubic root of 6997563 is about 191.2709165897.

The spelling of 6997563 in words is "six million, nine hundred ninety-seven thousand, five hundred sixty-three".