5503721 has 2 divisors, whose sum is σ = 5503722. Its totient is φ = 5503720.

The previous prime is 5503661. The next prime is 5503723. The reversal of 5503721 is 1273055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 1755625 = 1936^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 5503721 - 2⁶ = 5503657 is a prime.

Together with 5503723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5503723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751860 + 2751861.

It is an arithmetic number, because the mean of its divisors is an integer number (2751861).

Almost surely, 2^5503721 is an apocalyptic number.

It is an amenable number.

5503721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5503721 is an equidigital number, since it uses as much as digits as its factorization.

5503721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 5503721 is about 2346.0010656434. The cubic root of 5503721 is about 176.5572151445.

Adding to 5503721 its reverse (1273055), we get a palindrome (6776776).

The spelling of 5503721 in words is "five million, five hundred three thousand, seven hundred twenty-one".