6989563 has 8 divisors (see below), whose sum is σ = 8119520. Its totient is φ = 5892480.

The previous prime is 6989537. The next prime is 6989573. The reversal of 6989563 is 3659896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6989563 - 2¹³ = 6981371 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7758 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (1014940).

Almost surely, 2^6989563 is an apocalyptic number.

6989563 is a deficient number, since it is larger than the sum of its proper divisors (1129957).

6989563 is a wasteful number, since it uses less digits than its factorization.

6989563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437.

The product of its digits is 349920, while the sum is 46.

The square root of 6989563 is about 2643.7781676986. The cubic root of 6989563 is about 191.1979983072.

The spelling of 6989563 in words is "six million, nine hundred eighty-nine thousand, five hundred sixty-three".