6978751 has 8 divisors (see below), whose sum is σ = 7758464. Its totient is φ = 6233760.

The previous prime is 6978749. The next prime is 6978761. The reversal of 6978751 is 1578796.

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

It is not a de Polignac number, because 6978751 - 2¹ = 6978749 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 9⁷ + 7⁴ + 8⁷ + 7⁵ + 5⁷ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6978698 and 6978707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8256 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (969808).

Almost surely, 2^6978751 is an apocalyptic number.

6978751 is a deficient number, since it is larger than the sum of its proper divisors (779713).

6978751 is a wasteful number, since it uses less digits than its factorization.

6978751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17361.

The product of its digits is 105840, while the sum is 43.

The square root of 6978751 is about 2641.7325754133. The cubic root of 6978751 is about 191.0993607818.

The spelling of 6978751 in words is "six million, nine hundred seventy-eight thousand, seven hundred fifty-one".