6979787 has 4 divisors (see below), whose sum is σ = 7283280. Its totient is φ = 6676296.

The previous prime is 6979781. The next prime is 6979789. The reversal of 6979787 is 7879796.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6979787 - 2⁴ = 6979771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6979781) 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, 151712 + ... + 151757.

It is an arithmetic number, because the mean of its divisors is an integer number (1820820).

Almost surely, 2^6979787 is an apocalyptic number.

6979787 is a deficient number, since it is larger than the sum of its proper divisors (303493).

6979787 is a wasteful number, since it uses less digits than its factorization.

6979787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303492.

The product of its digits is 1333584, while the sum is 53.

The square root of 6979787 is about 2641.9286515726. The cubic root of 6979787 is about 191.1088165875.

Subtracting 6979787 from its reverse (7879796), we obtain a palindrome (900009).

The spelling of 6979787 in words is "six million, nine hundred seventy-nine thousand, seven hundred eighty-seven".