6978497 has 4 divisors (see below), whose sum is σ = 7003440. Its totient is φ = 6953556.

The previous prime is 6978481. The next prime is 6978511. The reversal of 6978497 is 7948796.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6978497 - 2⁴ = 6978481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6978437) 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 3 ways as a sum of consecutive naturals, for example, 12047 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (1750860).

Almost surely, 2^6978497 is an apocalyptic number.

It is an amenable number.

6978497 is a deficient number, since it is larger than the sum of its proper divisors (24943).

6978497 is a wasteful number, since it uses less digits than its factorization.

6978497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24942.

The product of its digits is 762048, while the sum is 50.

The square root of 6978497 is about 2641.6845004656. The cubic root of 6978497 is about 191.0970423236.

Subtracting 6978497 from its reverse (7948796), we obtain a cube (970299 = 99³).

The spelling of 6978497 in words is "six million, nine hundred seventy-eight thousand, four hundred ninety-seven".