8281009 has 4 divisors (see below), whose sum is σ = 9033840. Its totient is φ = 7528180.

The previous prime is 8281003. The next prime is 8281019. The reversal of 8281009 is 9001828.

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 not a de Polignac number, because 8281009 - 2⁹ = 8280497 is a prime.

It is a super-2 number, since 2×8281009² = 137150220116162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8281003) 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, 376399 + ... + 376420.

It is an arithmetic number, because the mean of its divisors is an integer number (2258460).

Almost surely, 2^8281009 is an apocalyptic number.

It is an amenable number.

8281009 is a deficient number, since it is larger than the sum of its proper divisors (752831).

8281009 is a wasteful number, since it uses less digits than its factorization.

8281009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752830.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 8281009 is about 2877.6742345165. The cubic root of 8281009 is about 202.3148457448.

It can be divided in two parts, 828100 and 9, that multiplied together give a square (7452900 = 2730²).

The spelling of 8281009 in words is "eight million, two hundred eighty-one thousand, nine".