6977989 has 8 divisors (see below), whose sum is σ = 7172640. Its totient is φ = 6786000.

The previous prime is 6977969. The next prime is 6978001. The reversal of 6977989 is 9897796.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6977989 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 (6977969) 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, 5374 + ... + 6544.

It is an arithmetic number, because the mean of its divisors is an integer number (896580).

Almost surely, 2^6977989 is an apocalyptic number.

It is an amenable number.

6977989 is a deficient number, since it is larger than the sum of its proper divisors (194651).

6977989 is a wasteful number, since it uses less digits than its factorization.

6977989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 1714608, while the sum is 55.

The square root of 6977989 is about 2641.5883479452. The cubic root of 6977989 is about 191.0924052385.

The spelling of 6977989 in words is "six million, nine hundred seventy-seven thousand, nine hundred eighty-nine".