4536391 has 4 divisors (see below), whose sum is σ = 4543992. Its totient is φ = 4528792.

The previous prime is 4536377. The next prime is 4536401. The reversal of 4536391 is 1936354.

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

It is a cyclic number.

It is not a de Polignac number, because 4536391 - 2⁹ = 4535879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4536341) 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, 2821 + ... + 4126.

It is an arithmetic number, because the mean of its divisors is an integer number (1135998).

Almost surely, 2^4536391 is an apocalyptic number.

4536391 is a deficient number, since it is larger than the sum of its proper divisors (7601).

4536391 is an equidigital number, since it uses as much as digits as its factorization.

4536391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600.

The product of its digits is 9720, while the sum is 31.

The square root of 4536391 is about 2129.8805130805. The cubic root of 4536391 is about 165.5402067926.

It can be divided in two parts, 45363 and 91, that added together give a palindrome (45454).

The spelling of 4536391 in words is "four million, five hundred thirty-six thousand, three hundred ninety-one".