4309813 has 4 divisors (see below), whose sum is σ = 4318240. Its totient is φ = 4301388.

The previous prime is 4309787. The next prime is 4309817. The reversal of 4309813 is 3189034.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3189034 = 2 ⋅1594517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4309813 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 (4309817) 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, 3393 + ... + 4486.

It is an arithmetic number, because the mean of its divisors is an integer number (1079560).

Almost surely, 2^4309813 is an apocalyptic number.

It is an amenable number.

4309813 is a deficient number, since it is larger than the sum of its proper divisors (8427).

4309813 is an equidigital number, since it uses as much as digits as its factorization.

4309813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8426.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 4309813 is about 2076.0089113489. The cubic root of 4309813 is about 162.7369387734.

The spelling of 4309813 in words is "four million, three hundred nine thousand, eight hundred thirteen".