5309621 has 4 divisors (see below), whose sum is σ = 5315244. Its totient is φ = 5304000.

The previous prime is 5309599. The next prime is 5309659. The reversal of 5309621 is 1269035.

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 1661521 + 3648100 = 1289^2 + 1910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5309621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5309921) 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, 1010 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (1328811).

Almost surely, 2^5309621 is an apocalyptic number.

It is an amenable number.

5309621 is a deficient number, since it is larger than the sum of its proper divisors (5623).

5309621 is a wasteful number, since it uses less digits than its factorization.

5309621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 5309621 is about 2304.2614868977. The cubic root of 5309621 is about 174.4567753630.

The spelling of 5309621 in words is "five million, three hundred nine thousand, six hundred twenty-one".