6728497 has 4 divisors (see below), whose sum is σ = 6753780. Its totient is φ = 6703216.

The previous prime is 6728467. The next prime is 6728503. The reversal of 6728497 is 7948276.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 2792241 = 1984^2 + 1671^2 .

It is a cyclic number.

It is not a de Polignac number, because 6728497 - 2⁷ = 6728369 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 7⁷ + 2¹⁷ + 8³ + 4³ + 9³ + 7⁸ .

It is a Duffinian number.

6728497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6728437) 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, 12238 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (1688445).

Almost surely, 2^6728497 is an apocalyptic number.

It is an amenable number.

6728497 is a deficient number, since it is larger than the sum of its proper divisors (25283).

6728497 is a wasteful number, since it uses less digits than its factorization.

6728497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25282.

The product of its digits is 169344, while the sum is 43.

The square root of 6728497 is about 2593.9346560775. The cubic root of 6728497 is about 188.7872619153.

It can be divided in two parts, 6728 and 497, that added together give a square (7225 = 85²).

The spelling of 6728497 in words is "six million, seven hundred twenty-eight thousand, four hundred ninety-seven".