5613721 has 4 divisors (see below), whose sum is σ = 5909200. Its totient is φ = 5318244.

The previous prime is 5613719. The next prime is 5613731. The reversal of 5613721 is 1273165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5613721 - 2¹ = 5613719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5613701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147711 + ... + 147748.

It is an arithmetic number, because the mean of its divisors is an integer number (1477300).

Almost surely, 2^5613721 is an apocalyptic number.

It is an amenable number.

5613721 is a deficient number, since it is larger than the sum of its proper divisors (295479).

5613721 is a wasteful number, since it uses less digits than its factorization.

5613721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295478.

The product of its digits is 1260, while the sum is 25.

The square root of 5613721 is about 2369.3292299721. The cubic root of 5613721 is about 177.7257169463.

Adding to 5613721 its reverse (1273165), we get a palindrome (6886886).

The spelling of 5613721 in words is "five million, six hundred thirteen thousand, seven hundred twenty-one".