6720497 has 6 divisors (see below), whose sum is σ = 7817778. Its totient is φ = 5760384.

The previous prime is 6720481. The next prime is 6720499. The reversal of 6720497 is 7940276.

It can be written as a sum of positive squares in only one way, i.e., 6105841 + 614656 = 2471^2 + 784^2 .

It is not a de Polignac number, because 6720497 - 2⁴ = 6720481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6720499) 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 5 ways as a sum of consecutive naturals, for example, 68528 + ... + 68625.

It is an arithmetic number, because the mean of its divisors is an integer number (1302963).

Almost surely, 2^6720497 is an apocalyptic number.

It is an amenable number.

6720497 is a deficient number, since it is larger than the sum of its proper divisors (1097281).

6720497 is a wasteful number, since it uses less digits than its factorization.

6720497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137167 (or 137160 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 6720497 is about 2592.3921385469. The cubic root of 6720497 is about 188.7124112684.

The spelling of 6720497 in words is "six million, seven hundred twenty thousand, four hundred ninety-seven".