8256813 has 4 divisors (see below), whose sum is σ = 11009088. Its totient is φ = 5504540.

The previous prime is 8256779. The next prime is 8256823. The reversal of 8256813 is 3186528.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 8256813 - 2⁶ = 8256749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376133 + ... + 1376138.

It is an arithmetic number, because the mean of its divisors is an integer number (2752272).

Almost surely, 2^8256813 is an apocalyptic number.

It is an amenable number.

8256813 is a deficient number, since it is larger than the sum of its proper divisors (2752275).

8256813 is a wasteful number, since it uses less digits than its factorization.

8256813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752274.

The product of its digits is 11520, while the sum is 33.

The square root of 8256813 is about 2873.4670695868. The cubic root of 8256813 is about 202.1176078850.

The spelling of 8256813 in words is "eight million, two hundred fifty-six thousand, eight hundred thirteen".