4809213 has 18 divisors (see below), whose sum is σ = 7223294. Its totient is φ = 3201768.

The previous prime is 4809209. The next prime is 4809251. The reversal of 4809213 is 3129084.

It can be written as a sum of positive squares in only one way, i.e., 4782969 + 26244 = 2187^2 + 162^2 .

It is not a de Polignac number, because 4809213 - 2² = 4809209 is a prime.

It is a super-3 number, since 3×4809213³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6195 + ... + 6927.

Almost surely, 2^4809213 is an apocalyptic number.

It is an amenable number.

4809213 is a deficient number, since it is larger than the sum of its proper divisors (2414081).

4809213 is an frugal number, since it uses more digits than its factorization.

4809213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 4809213 is about 2192.9917920503. The cubic root of 4809213 is about 168.7943883230.

The spelling of 4809213 in words is "four million, eight hundred nine thousand, two hundred thirteen".