6989711 has 4 divisors (see below), whose sum is σ = 6997152. Its totient is φ = 6982272.

The previous prime is 6989687. The next prime is 6989713. The reversal of 6989711 is 1179896.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6989711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6989713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2066 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (1749288).

Almost surely, 2^6989711 is an apocalyptic number.

6989711 is a deficient number, since it is larger than the sum of its proper divisors (7441).

6989711 is a wasteful number, since it uses less digits than its factorization.

6989711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7440.

The product of its digits is 27216, while the sum is 41.

The square root of 6989711 is about 2643.8061577960. The cubic root of 6989711 is about 191.1993478004.

It can be divided in two parts, 69897 and 11, that multiplied together give a palindrome (768867).

The spelling of 6989711 in words is "six million, nine hundred eighty-nine thousand, seven hundred eleven".