5097721 has 4 divisors (see below), whose sum is σ = 5102244. Its totient is φ = 5093200.

The previous prime is 5097683. The next prime is 5097751. The reversal of 5097721 is 1277905.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2073600 + 3024121 = 1440^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 5097721 - 2¹⁷ = 4966649 is a prime.

It is a Duffinian number.

5097721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5097751) 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, 951 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (1275561).

Almost surely, 2^5097721 is an apocalyptic number.

It is an amenable number.

5097721 is a deficient number, since it is larger than the sum of its proper divisors (4523).

5097721 is a wasteful number, since it uses less digits than its factorization.

5097721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 5097721 is about 2257.8133226642. The cubic root of 5097721 is about 172.1044187486.

The spelling of 5097721 in words is "five million, ninety-seven thousand, seven hundred twenty-one".