8249681 has 4 divisors (see below), whose sum is σ = 8999664. Its totient is φ = 7499700.

The previous prime is 8249623. The next prime is 8249687. The reversal of 8249681 is 1869428.

8249681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8249681 - 2¹⁸ = 7987537 is a prime.

It is a super-2 number, since 2×8249681² = 136114473203522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8249687) 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 3 ways as a sum of consecutive naturals, for example, 374975 + ... + 374996.

It is an arithmetic number, because the mean of its divisors is an integer number (2249916).

Almost surely, 2^8249681 is an apocalyptic number.

It is an amenable number.

8249681 is a deficient number, since it is larger than the sum of its proper divisors (749983).

8249681 is a wasteful number, since it uses less digits than its factorization.

8249681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749982.

The product of its digits is 27648, while the sum is 38.

The square root of 8249681 is about 2872.2257919600. The cubic root of 8249681 is about 202.0593966429.

The spelling of 8249681 in words is "eight million, two hundred forty-nine thousand, six hundred eighty-one".