4391213 has 4 divisors (see below), whose sum is σ = 4397340. Its totient is φ = 4385088.

The previous prime is 4391161. The next prime is 4391221. The reversal of 4391213 is 3121934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121934 = 2 ⋅1560967.

It can be written as a sum of positive squares in 2 ways, for example, as 3087049 + 1304164 = 1757^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 4391213 - 2¹⁴ = 4374829 is a prime.

It is a super-2 number, since 2×4391213² = 38565503222738, 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 (4391263) 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, 1820 + ... + 3477.

It is an arithmetic number, because the mean of its divisors is an integer number (1099335).

Almost surely, 2^4391213 is an apocalyptic number.

It is an amenable number.

4391213 is a deficient number, since it is larger than the sum of its proper divisors (6127).

4391213 is an equidigital number, since it uses as much as digits as its factorization.

4391213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126.

The product of its digits is 648, while the sum is 23.

The square root of 4391213 is about 2095.5221306395. The cubic root of 4391213 is about 163.7550999713.

The spelling of 4391213 in words is "four million, three hundred ninety-one thousand, two hundred thirteen".