8256993 has 4 divisors (see below), whose sum is σ = 11009328. Its totient is φ = 5504660.

The previous prime is 8256973. The next prime is 8257003. The reversal of 8256993 is 3996528.

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 8256993 - 2⁵ = 8256961 is a prime.

8256993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8256973) 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, 1376163 + ... + 1376168.

It is an arithmetic number, because the mean of its divisors is an integer number (2752332).

Almost surely, 2^8256993 is an apocalyptic number.

It is an amenable number.

8256993 is a deficient number, since it is larger than the sum of its proper divisors (2752335).

8256993 is a wasteful number, since it uses less digits than its factorization.

8256993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752334.

The product of its digits is 116640, while the sum is 42.

The square root of 8256993 is about 2873.4983904641. The cubic root of 8256993 is about 202.1190766076.

It can be divided in two parts, 82 and 56993, that added together give a palindrome (57075).

The spelling of 8256993 in words is "eight million, two hundred fifty-six thousand, nine hundred ninety-three".