4531309 has 4 divisors (see below), whose sum is σ = 4538716. Its totient is φ = 4523904.

The previous prime is 4531283. The next prime is 4531313. The reversal of 4531309 is 9031354.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3422500 + 1108809 = 1850^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 4531309 - 2¹⁹ = 4007021 is a prime.

It is a super-2 number, since 2×4531309² = 41065522506962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4531339) 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, 2694 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (1134679).

Almost surely, 2^4531309 is an apocalyptic number.

It is an amenable number.

4531309 is a deficient number, since it is larger than the sum of its proper divisors (7407).

4531309 is an equidigital number, since it uses as much as digits as its factorization.

4531309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 4531309 is about 2128.6871540929. The cubic root of 4531309 is about 165.4783669086.

The spelling of 4531309 in words is "four million, five hundred thirty-one thousand, three hundred nine".