2864813 has 4 divisors (see below), whose sum is σ = 3274080. Its totient is φ = 2455548.

The previous prime is 2864761. The next prime is 2864831. The reversal of 2864813 is 3184682.

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: 3184682 = 2 ⋅1592341.

It is a cyclic number.

It is not a de Polignac number, because 2864813 - 2⁶ = 2864749 is a prime.

It is a super-3 number, since 3×2864813³ = 70535880333981047391, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2864813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2864833) 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, 204623 + ... + 204636.

It is an arithmetic number, because the mean of its divisors is an integer number (818520).

2^2864813 is an apocalyptic number.

It is an amenable number.

2864813 is a deficient number, since it is larger than the sum of its proper divisors (409267).

2864813 is an equidigital number, since it uses as much as digits as its factorization.

2864813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409266.

The product of its digits is 9216, while the sum is 32.

The square root of 2864813 is about 1692.5758476358. The cubic root of 2864813 is about 142.0252054708.

The spelling of 2864813 in words is "two million, eight hundred sixty-four thousand, eight hundred thirteen".