6988775 has 6 divisors (see below), whose sum is σ = 8666112. Its totient is φ = 5591000.

The previous prime is 6988771. The next prime is 6988777. The reversal of 6988775 is 5778896.

It is a happy number.

It is not a de Polignac number, because 6988775 - 2² = 6988771 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 (6988771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139751 + ... + 139800.

It is an arithmetic number, because the mean of its divisors is an integer number (1444352).

Almost surely, 2^6988775 is an apocalyptic number.

6988775 is a deficient number, since it is larger than the sum of its proper divisors (1677337).

6988775 is a wasteful number, since it uses less digits than its factorization.

6988775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279561 (or 279556 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 6988775 is about 2643.6291343530. The cubic root of 6988775 is about 191.1908128467.

The spelling of 6988775 in words is "six million, nine hundred eighty-eight thousand, seven hundred seventy-five".